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DG Pugh DVM MS Dipl ACT, ACVN, & ACVM
Project Veterinarian AUESPP
Anthelmintic Resistance and Control of Internal Parasites in
Small Ruminants
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Holistic
Adj holistic - emphasizing the organic or functional relation between parts and the whole
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Avoid or try to Minimize • Opportunistic deworming
• Suppressive deworming – selection for resistance (Meningeal worm prevention)
• Endectocide rotation • Sub-optimal nutrition • Pasture contamination & overstocking
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How Resistance Happens
Poor Management (Fleming, J Vet Int Med 2006; Howell, JAVMA 2008; Kaplan, Essentials Vet Parasit, 2011; Miller, Pugh, Kaplan, Sheep & Goat Med 2, 2012)
Using cow doses for sheep & sheep doses for goats… ! (Conder, Adv Parasit, 1995)
Route of MOX might effect efficacy (90% PO vs 58% SC) (Zarate, WAAVP, 2009)
Topical application on camelids not absorbed to therapeutic concentrations…..designed for cattle (Hunter, Small Ruminant Res, 2004; Hunter, J Vet Pharmacol Ther, 2004; Ballweber, Vet Clin NA, 2009)
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Avoid or try to Minimize • Opportunistic deworming • Endectocide rotation • Sub-optimal nutrition • Pasture contamination & overstocking
• Suppressive deworming – selection for resistance (Meningeal worm prevention)
(Pugh, Hilton, & Mobini, Comp Cont Ed, 1998; Pugh & Navarre, Vet Clin North America, 2001)
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Classes of Dewormers Avermectins - ivermectin, doramectin, eprinomectin
Milbemycins - moxidectin Benzimidazoles - albendazole, fenbendazole,
oxfebendazole, oxibendazole Cholinergic Agonists - levamisole, morantel, pyrantel Amino-Acetonitrile Derivatives (AADs)
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How Resistance Happens
Indiscriminate use of anthelmintics Over use of anthelmintics Lack of Biosecurity - animal movement to & from farms - poor quarantine practices - failure to effectively treat new farm additions Poor Management (Howell + JAVMA 2008; Fleming + J Vet Int Med 2006)
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Anthelmintic Resistance -Increased frequency of dewormer administration
-Continued and frequent use of a single class of dewormer -Underdosing (poor wt estimation, improper administration, etc)
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SUPPRESSIVE DEWORMING PROGRAMS SELECT FOR
RESISTANCE • Resistance alleles occur naturally, but selection
(treatment) increases frequency • • Practices that select for resistance include: - Repeated and exclusive use of a single class of dewormer - Frequent treatments ( <E.R.P. ) - Anything that minimizes refugia
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Dewormers
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Drug Resistance Refugia – The proportion of the population
(Haemonchus) that is not selected by drug treatment
It provides a pool or reservoir of drug-
susceptible genes and dilutes the prevalence of resistant genes, and maintains biodiversity within a species
(Martin, Int J Parasit 1981; Van Wyk, Onderstpoort J Vet Res 2001; Sissay, Vet Parasit 2006; Miller, Pugh, Kaplan, Sheep & Goat Med 2, 2012)
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Avoid or try to Minimize • Opportunistic deworming • Endectocide rotation • Sub-optimal nutrition • Pasture contamination & overstocking
• Suppressive deworming – selection for resistance (Meningeal worm prevention)
(Pugh, Hilton, & Mobini, Comp Cont Ed, 1998; Pugh & Navarre, Vet Clin North America, 2001)
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Macrocyclic Lactones Resistance Sheep & Goats Craig & Miller, Vet Rec, 1990 - IVM (Tx) Miller, Vet Parasitol, 1994 IVM (La) Mortenson, JAVMA, 2003 goats – 94% - IVM, 5.5% - MOX Howell, JAVMA, 2008 sheep/goats – 76% - IVM, 24% - MOX
Camelids Gillespie, Vet Parasit, 2010 ( – 88% - IVM, - 22% - MOX) Sarre, Vet Parasit, 2012 (Belgium, DOR – 68% - 41% efficacy)
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Benzimidazoles Benzimidazoles….albendazole, fenbendazole,
oxfebendazole, oxibendazole - Resistant worms suck more blood (larger?) lay more eggs
Albendazole – high dosing (20-50mg/kg) for multiple days, signs-bone marrow suppression, diarrhea, hair loss, death – 3 cases at Auburn (Unpublished data)
- 12 cases at Tufts (Gruntman J Vet Int Med 23, 2009)
Fenbendazole – paste formulation is absorbed similarly in
goats, sheep & lamas, but it’s rate of elimination is longer in lamas (Beier, Small Rumin Res, 2000)
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Benzimidazoles Resistance – Sheep/Goats Drudge, AJVR 1964 (Ky) Shelton, JAS 1968 (Tx) Anderson, AJVR 1973 (Australia) Miller, AJVR 1980 (La) Herd, JAVMA 1984 (Ohio) Uhlinger, J Vet Int Med 1988 (NC) Craig, Vet Rec, 1990 (Tx) McKenna, NZ Vet J 1990 (NZ) Uhlinger, JAVMA 1992 ( NC) Mortenson, JAVMA 2003 – Goats 93% (Ga/SC) Howell, JAVMA 2008 – Sheep/Goats 98% (Southeast USA)
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Benzimidazoles Resistance – Camelids Zarate WAAVP, 2009 Gillespie, Vet Parasit, 2010 – 100% resistance
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Classes of Dewormers Cholinergic Agonists….levamisole, morantel, pyrantel
Levamisole (Imidothiazole) – effective against active feeding worms - resistance by Haemonchus is sex linked Morantel (Thiofuran) - approved for use in lactating dairy goats H contortus – Morentel tarturate not consistently effective
when fed to levamisole susceptible camelids (Williamson ICRS, 2012)
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Levamisole / Morantel- Sheep & Goats Hembry, AJVR, 1986 Craig, Vet Clin NA, 1986 Miller, Vet Parasitol, 1987 Miller & Craig, TAES Res Rept, 1988 Mortenson, JAVMA, 2003 - goats LEV - 24% Howell, JAVMA, 2008 – sheep/goats LEV – 54%
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Camelid nematode GI parasites
Zarate WAAVP, 2009 - still sensitive to LEV Williamson ICRS, 2012 – 22 % - LEV
Strongid C fed to llamas daily (2x horse dose) for 1 yr had no significant EPG difference than controls after 2 mo (Pugh, Bagburn, Hendrix, Proceed Camelid Res Conf 1998)
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Multi-family Resistance Craig, Pro West Vet Conf, 1998 (BZD, LEV + - Tx) Craig, Small Rumin Res, 1996 (all but MOX – Tx)
Zajac, Vet Parasitol, 2000 (all but MOX - Va) Mortensen, JAVMA, 2003 (all + MOX in 1/15 – south east) Kaplan, AAVP Proceed, 2005 (all- 1 farm - Arkansas)
Howell, JAVMA, 2008 (48% of all farms had resistance to all but MOX… 17% were resistant to all – 8 SE states)
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Camelid trichostrongyle-type nematode parasites (GIN)
Haemonchus contortus – 97% (28 farms) multi drug resistance - 13% (4 farms) resistant to all classes of dewormers T colubriformis (Williamson ICRS, 2012)
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Haemonchus contortus
• Tremendous fecundity – 5000 –6000/eggs/female/day (T Craig – personal communication, 2006)
• Host develop poor immune response -animals <3-6 mo old
-high prolactin concentrations
-low protein diet -poor genetics
• Hypobiotic in small ruminants
Haemonchus contortus
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Monitoring Parasite Resistance
• Fecal Egg Count Reduction Test – Want 90% decline in egg count 10
days -FECRT • Fecal egg counts can also
– determine when to deworm again – verify ERP
• Prevent resistance with minimal use of anthelmintics and surveillance of ERP
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Parasite Control Programs
• Need Sustainable programs • Dilute anthelmintic resistant worms by
selective deworming • 20% of animals harbor 70-80% of the
parasites….ID and CULL (FAMACHA, EPG, BCS, etc)
• Salvage deworm and CULL • Pasture rotation programs => clean pastures
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Deworming Programs Targeted Deworming - Treat only those that need deworming, contribute
the most to pasture contamination - Periparturient animals - Peak Lactation animals - Decrease resistance
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Targeted Deworming BCS, FEC, Milk Production , ? (van Wyk Vet Parasit 2006)
FAMACHA
(Kaplan Proceed AVMA Ann Conf 2003; Burke Vet Parasit 2007; Kaplan Vet Parasit 2004)
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Strategies - Disease Control • Does an ID & record system exist to allow
monitoring of disease?
• What is the current herd status? – Is this disease being monitored? – What other diseases should be considered?
• Do the goats commingle with other species?
• Is the herd “closed” and to what degree?
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Deworming Programs Tactical deworming - Deworm when the potential for parasites is
increasing…. - EPG (>1000 EPG in spring and >2000 in fall in
the southern and >500 EPG in northern USA) T Craig, 2006
- 10-14 d post rain - When moving to new pastures
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Deworming Programs Salvage - Save a life - Does not select for resistance
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FAMACHA
- Low level parasitism is tolerable - Healthy appearing Camelids with optimal BCS are less
likely to be severely parasitised ( Williamson, ICRS, 2012)
- Dr Francois (Fafa) Malan’s Chart - 1- deep red (non anemic) - 2 - red – pink (non anemic) - 3 - pink (mild anemia) - 4 - white – pink (anemic) - 5 – white ( severely anemic)
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“Mother worm can’t even differentiate (HOTC complex) eggs”
Tom Craig DVM PhD Hero Scholar Parasitologist of the Highest Order
Haemonchus eggs distinguishable with a Peanut Agglutination (Hillrichs WAAVP 2009 pg 81)
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Parasite Control Helpers FERT Periodically check effectiveness of dewormers
(Deworm/fecal EPG =>fecal EPG 10-14 d later….. <90% drop in EPG=resistance)
Haemonchus contortus
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Classes of Dewormers Avermectins…ivermectin, doramectin, eprinomectin Milbemycins….moxidectin Benzamedazoles….albendazole, fenbendazole,
oxfebendazole, oxibendazole, Cholinergic Agonists….levamisole, morantel,
pyrantel Amino-Acetonitrile Derivatives (AADs)
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Macrocyclic Lactones
(DECTOMAX)
Bio-synthetic
Avermectins Milbemycins
Semi-synthetic Milbemycin Oxime
Semi-synthetic Moxidectin
(INTERCEPTOR) (CYDECTIN) Doramectin
Semi-synthetic Ivermectin
(IVOMEC) Eprinomectin (EPRINEX)
Abamectin
Many Others Nemadectin
Family Tree for Endectocides
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Macrolides Increase efficacy – Fast overnight Dry Feed
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Cydectin Pour-On: Sheep/Goats
Cydectin Pour-On…PO…1cc/22# BW => 1cc/50# BW ????
(Pugh, Hilton, & Mobini, Comp Cont Ed, 1998; Pugh & Navarre, Vet Clin North America, 2001)
MANY OTHERS…….still NOT APPROVED FOR USE
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Classes of Dewormers Benzimidazoles….albendazole, fenbendazole,
oxfebendazole, oxibendazole - Resistant worms suck more blood (larger?)
lay more eggs - Fasting increases contact time…and increases
efficacy also – divide dosage over several days, dry feed
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Classes of Dewormers Cholinergic Agonists….levamisole, morantel, pyrantel Levamisole (Imidothiazoles) – effective against active feeding worms - resistance by Haemonchus is sex linked - Be careful on HOT days - dose at 1.5 x cow dosage (?) Levamisole – 5-8 mg/kg, PO; or 6 mg/kg SC Pyrantel pamoate – 8.5 mg/kg, PO
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Dosage Recomendations
Goats – 2x sheep dosage of Benzimidazoles and ML’s - 1 => 1.5x sheep dosage of cholinergic drugs Small Ruminants can be given combinations of dewormers at
the same time, Benzimidazoles can be given every 12 hours for several doses
to increase the effectiveness.
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Deworming Programs Targeted Deworming - Treat only those that need deworming, contribute
the most to pasture contamination - Periparturient animals - Peak Lactation animals - Decrease resistance
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Coccidia
Counts 5000 epg feces => significant(> 100,000 in severe outbreaks) Ocysts found in normal animals
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Coccidia • Kids!
– 3 weeks to 5 months of age – Most important cause of diarrhea – Immunity
• Develops “resistance” over time
• Prevalence – 38-100% of all infected goats – Infection with multiple species
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Clinical Signs • Sudden death appetite, listlessness, weakness &
abdominal pain • Diarrhea
– Watery yellowish-green to brown ± frank blood
– Stained hind quarters • Dehydration • Secondary bacterial infections • Stunted growth, ill thrift • Weight loss
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Diagnosis of coccidia not (NOT) based on detection of oocysts in feces… but ??? (Chigerwe, J Vet Diag, 2007; Ballweber, Vet Clin NA, 2009)
Majority of GIT damage occurs pre shedding (E Mac…..) (Cebra, JAVMA, 2007)
Diagnosis of clinical cases ….. based on ??? - Previous farm history - Clinical signs - History of recent stress
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Tapeworms & seen in normal asymtomatic animals (Williamson UF Alpaca Symp 2010)
Tapeworms – no problem in sheep (Elliott New Zealand Vet J 1986 +)
Tapeworms associated with C. perfringens ??? (Craig Personal communication 2010)
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Monezia sp – Tx FBZ (<~50mg/kg q5d PO) praziquantel (50mg/kg PO) albendazole (10mg/kg PO)
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Resistance to parasites Heritability of resistance to some nematode
parasites in sheep might be as high as 0.3 to 0.4 (pretty high !!!!) for sheep…..
So….. Selection for resistance can help…a
bunch
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Novel Worm Control Strategies in Development
The buck / ram account for ~50% of flock genetics. - Perform multiple FEC in spring-summer, cull highest count
males - FAMACHA, cull highest scores
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Parasite Control Helpers
Quarantine & deworm (with 2 different classes of dewormers) ALL flock additions for 30+ days
Kaplan’s Quarantine Plan – Fast new additions
24hrs, then deworm sequentially –same day- moxidectin, levamisole, albendazole. Wait 14 d, fecal float and allow animal to enter flock if negative.
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Parasite Control Helpers
Kaplan’s Quarantine Plan – Fast new additions 24hrs, then deworm sequentially –same day- Moxidectin, levamisole, albendazole. Wait 14 d, fecal float and allow animal to enter flock if negative.
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Parasite Control Helpers
Periodically check effectiveness of dewormers
(Deworm/fecal EPG =>fecal EPG 10-14 d later….. <90% drop in EPG=resistance)
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Parasite Control Helpers
• Dose based on largest animal of group • Insure adequate intake • Fast animals 24 hrs pre-deworming, and
hold animals in a paddock (feed) for up to 72 hrs post deworming…then move to safe pasture
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Parasite Control Helpers
• Dose 2 classes of drugs…together (T CRAIG…. Personal communication; ACVIM Proceed, 2005)
• Give a drug @ therapeutic dosage for 3-5 d (Fleming + J Vet Int Med 2006)
• Move to NEW ground
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Other environmental factors
Moisture favors Strongyle development and persistence. most infective larvae will be near the root of
the grass Overgrazing Increases exposure
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Pasture Management
Parasites – more animals => more feces (more parasite eggs => larvae =>
more parasites) Need grass to complete life cycle (kinda)
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Management Practices - Reduce Stocking Rate - Rotation grazing (long rest – 70 d ?)) - Graze forage >4” above ground…ONLY - Graze tannin-rich crops (sericea lezpedeza, chicory,
birds foot trefoil, ) - Graze/Browse sorgham, sudan, eastern gama, etc - Alternate grazing with (cows etc) row crops, hay - Strategic, Tactical, Targeted - Cull repeat Offenders
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Pasture Management Rotation
• Rotate to pastures used for small grain, hay horses, cows…..etc…NO small ruminants for a while
• Soil test and fertilize accordingly (burn, etc)
• Graze when grass is 6-8” tall …stop grazing when grass is 3-4” from the ground
• Legumes (protein, organic content of soil, good bacteria, increase water retention, improved digestibility of forages)
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Decreasing Exposure • removing feces
from pasture – not-practical in
most settings (except arid areas)
– cannot get it all (DC Taylor, personal communication, 2013)
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Mineral Nutrition and Parasites
• Ca (legumes) • P (winter forages) • S (if browsing & feeding NPN)
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Mineral Needs
Phosphorus and Trace Minerals 6 to 12 % P All trace minerals
Consumption is very important 1 to 2 ounces/day of total mineral
supplement
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Novel Worm Control Strategies in Development • Condensed tannin containing forage
– S. lespedeza, Quebracho extract, Sanfoin hay (Min JAS 2003; Shaik South Africa JAS 2004)
• Nematophagous (nematode-trapping) fungi
– Duddingtonia flagrans (Terrill Vet Parasit 2004; Larsen JAS 2006)
• Copper-wire bolus (Bang Res Vet Sci 1990; Burke Vet Parasit 2004)
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Novel Worm Control Strategies in Development
Copper-wire bolus (COWP) - copper oxide - OK for Haemonchus ~ 60% effective ???? (Bang Res Vet Sci 1990; Burke Vet Parasit 2004)
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Copper oxide wires in kids • Dose
– 0.5 gram
• Frequency – repeated as soon as 6 weeks not to exceed 4
treatments in a worm season
• extra label/compounding • potential for toxicity – know dietary intake
and forage analyses including Mb, S, and Cu
http://www.sheepandgoat.com/ACSRPC/Resources/PDF/COWPlambskids.pdf
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Natural / Holistic / New Wave
Cu sulfate - ~60% effective ???? poorly effective for Haemonchus Cu oxide less txic than Cu sulfate ( Cu toxicity- Scharko ACVIM 2006; Van Saun – numerous, Junge
JAVMA 1989, Mullaney Am Assoc Vet Lab Diag 1996, Weaver Can Vet J 1999, Carmalt Can Vet J 2001, Pugh J Camel Prac Res 1999)
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Organic Noun 1. A substance, especially a fertilizer or
pesticide, of animal or vegetable origin. 2. Chemistry An organic compound. 3. Carbon-based chemistry
2 Cu + O2 → 2 CuO
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If You Are Sick: 2000 B.C. – Here, eat this root. 1000 A.D. – That root is heathen. Here, say this prayer. 1850 A.D. – That prayer is superstition. Here, drink this
potion. 1940 A.D. – That potion is snake oil. Here, swallow this
pill. 1985 A.D. – That pill is ineffective. Here, take this
antibiotic. 2000 A.D. – That antibiotic is artificial. Here, eat this root
• How do we know which treatments are useful? • Evidence Based Medicine?
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Herbal’s
Herbal anthelmintic remedies were
administered in the traditional way by . Efficacy was determined using
percent fecal egg count reduction (percent FECR) test.
Efficacy for Myrsine afriacana, Albizia antihelmintica and Hilderbrantia sepalosa against Monezia sp was 100%.
The efficacy for albendazole was 63% (?). (Ganthuma, J Ethnopharmacol 91:7, 2004)
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Herbals
Herbal anthelmintic remedies were showed
no benefit, when following manufacturer recommendations.
Treated group were more anemic (Ar) (Burke, Vet Parasit, 2009)
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Novel Worm Control Strategies in Development
- 600mg/kg bw of Orange oil emulsion reduced FEC by 97.4% @ 14 d post tx in sheep (Squires, Vet Parasit 2010)
- Albizia anthelmintica bark fed to lambs (0.9 mg) reduced FEC by 78% (Grade, Vet Parasit 2008)
- Lippia sioides essential oil (283 mg/kg) reduced FEC by 56.9% by 14 d post Tx vs ivermectin 39.3 against Haemonchus (Camurca-Vasconcelos, Vet Parasit 2008)
- Ethanolic extracts of Iris hookeriana rhizome (2g/kg bw) reduced FEC by 45.62% by 10 d post Tx (Tariq, J Helminthol 2008)
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Novel Worm Control Strategies in Development
- Feeding Azadirachta indica (neem) leaves did not affect FEC vs controls (Chandrawathani, Trop Biomed 2006)
- Azadirachta indica seed (3mg/kg) @ 15d post Tx reduced FEC by up to 40.2% vs levamisole (99.2%) (Igbal, Vet Parasit 2010)
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Novel Worm Control Strategies in Development
- Mucuna pruriens a tropical legume reduced FEC 7-18% vs levamisole (87%) in goats (Huisden, J Ethnopharmacol 2010)
- Cocos nucifera fruit extracts had no activity against GIT in sheep (Oliveria, Vet Parasit 2009)
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Holostic Parasite Control
Onions Garlic Diatomaceous earths
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Holostic Parasite Control
Onions
Garlic
Diatomaceous earths
Mix with Moxidectin
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General Health Care Heifers gained an average of 20.2, 16,4, and 20.4 kg for
control, DE, and CT, respectively, during the six-weeks study
(Alternative Anthelmintics for Organic Dairy Cattle; Project Leader: Dr. Jean Bertrand, Professor, Animal and Veterinary Science)
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DE Mean fecal egg counts (FEC) ± SE for heifers on control, diatomaceous
earth and condensed tannin (CT) treatments. -------x------DE (Alternative Anthelmintics for Organic Dairy Cattle; Project Leader: Dr. Jean Bertrand, Professor,
Animal and Veterinary Science)
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Novel Worm Control Strategies in Development • Dilution of resistance
– Re-introduction of susceptible strains of parasites
• Vaccines
• Protein Supplementation before kidding/lambing – 250 gm cottonseed meal per day
(Kyriazakis, 1996; Coop, 1999)
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Nutrition & Parasites Feeding to meet nutritional requirements for optimal
growth/production are more prone to have better resistance and resilience (Wallace Res Vet Sci, 1996; Coop Vet Parisit, 1997)
Providing supplemental protein improves resistance &
resilience, particularly with protected protein (Kyriazakis, 1996; Coop, 1999; Houdijk, 2009)
• Protein Supplementation before kidding/lambing – 250 gm cottonseed meal per day (Kyriazakis, 1996; Coop, 1999)
…….However SBM is effective (Torres-Acosta, 2004)
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Nutrition & Parasites
Feeding forages with condensed tanins may help prevent parasitic disease (Min, 2003; Niezen, 1995; Min & Hart, 2003; Athanasidou, 2001 …. Shaik, Vet Parasitol, 2006 etc)
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Protein / Energy / Vitamins Excessive tannin intake => depression of food intake binding dietary proteins and digestive enzymes injury to parts of the GI tract (Zafar, 2002) Thus… balance must be drawn to maximize the
positive effects on GI parasite control, while minimizing some of the deleterious effects
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Dietary Management Supplemental soybean meal and energy
can improve resilience. Dietary supplementation appears is more effective when targeted. (NRC, 2007)
Ex- additional of protein during early pregnancy =>immunity to parasites at parturition (sheep ?) (Kindane, Vet Parasit, 2009; Valderrabano, Vet Parasit, 2006; Kahn, Vet Parasit, 2003)
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Feeding Ruminant Animals
Feed related costs account for >60% of total expenditures for herds/flocks herds
Four-Step Supplementation 1) Energy 2) Protein – maintain 7-8% CP for entire diet when
not lactating 3) Vitamin – supplement / inject 4) Minerals – free choice salt w/ 8-12% Ca & P, and
TM (S Wikse)
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Goats
VERY selective grazers Utilize browse Add one for each existing cow without
competing for forage About 5-7 per animal unit
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Limitations If forage availability is not limiting then can
generally meet all needs Selective Specific plants Specific plant parts
Browse is also important Browse vs grass (2:1)?
Under these conditions only minerals would be needed
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Body Condition Score (BCS) BCS 3.5
Spinous processes not visible Shoulder & sternum not
palpable
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Limited Forage
Needs for energy and/or protein
Prod Status TDN CP
Maint 55 7.8
Late Preg 58 9.8
Lact 68 11.7
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Protein Supplementation
Soybean meal and cottonseed meal Both work extremely well for goats Compare cost
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Supplementation Methods
Submissive goats underfed and dominant goats overfed Provide as much feeder space as is
practical With some feeds can feed twice as much
every other day Best is limit grazing of high-quality forage
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Feeding the Doe
BCS of 2.5-3 (1-5) and gaining wt Flushing – good response moderate condition - poor response good to fat does - begin 2 wks prebreeding=>for 2-3 wks
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Feeding & Reproduction
And they were as fed horses in the morning, everyone neighed after his neighbor’s wife.
Jeremiah 5:8
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Energy Supplementation
Corn Can be fed whole-shelled Always begin with gradual amounts
Soyhulls Widely available in Southeast Equal to corn as a supplement Less problems with acidosis
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Supplementation Methods
Submissive goats underfed and dominant goats overfed Provide as much feeder space as is
practical With some feeds can feed twice as much
every other day Best is limit grazing of high-quality forage
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Feeding the Doe: Late Gestation
Trimester 1 & 2 => maintenance Trimester 3 => increase CP & E BCS >3 => potential for dystocia and
pregnancy toxicity
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Feeding the Doe: Lactation More nutrients needed for more milk produced (30% more milk for twins vs singleton) Doe weighs ~10% of cow… but needs >12-14% more
nutrients Lactating doe can consume ~ 4-5 % of BW… or more Peak lactation => expect wt loss
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Feeding the Doe: Lactation
Can feed a diet up ~ 4-5% fat (2-3% oil seed – 1-2 % speciality fats)
WCS – 90% TDN & 21-23% CP….. <20% of diet Feed a diet of 12-14% CP and 55-60% TDN
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Weaning Kids Wean as early as 3-4 wks - weigh 20-25 #, eating 0.5# grain/d (16-18% CP) - feed Bunks ‘T’ to fence line - good quality forage - feed dam hay only Need a post weaaning death loss of < 4%
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The Cyclicity of the Doe
Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul
cycling
transitional
anestrous
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The Cycling Doe and Prostaglandins
0 11 15
Prostaglandins:
dinoprost
cloprostenol
ESTRUS
24-72hrs
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Biosecurity Separate pregnant female by age &
gestation stage - quarantine & monitor 30 d PP - late gestational immunosepression =>
potential for nasal shedding or fecal shedding
Immediate isolation of sick or abortion cases
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Fetal Wastage - Prevention Biosecurity – Isolate additions for 30d - Avoid cow, hog, cat, rat, deer, dog(?) exposure - Maintain separate production units - Maintain healthy animals –CP/Minerals, BCS,
clean water, feed above ground, etc Vaccinate – Chlamydia, Campylobacter, etc in
endemic areas 4 & 2 mo pre partum (?)
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Pregnant Female Care: Final Trimester Avoid Transport Vaccinate – 4-6 wks PP Move to Cria-tion site 14-21d pre-birth Birthing site - Pasture
- Stall -14x14 - Straw bedding
(stripped and cleaned between animals)
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Feeding the Doe: Late Gestation
Trimester 1 & 2 => maintenance Trimester 3 => increase CP & E BCS >3 => potential for dystocia and
pregnancy toxicity
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PARTURITON The second stage
-delivery of the fetus, 1 to 2 hrs., usually in lateral (older does may remain
standing)
-the amnion protrudes from the vulva, followed by the forefeet & head ( NOTE: A
Doe that fails to continue progressing should be examined)
-posterior presentation is normal if both legs are extended and delivery occurs
rapidly
-With multiple kids the Doe may or may not rest between deliveries or the
deliveries may occur in quick succession
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PARTURITON The Second Stage
If the Doe strains without producing any kid more than 30 min,
intervention is indicated.
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PARTURITON The Third Stage - delivery of the placenta (6 hrs) and involution of the uterus.
- If no signs of septicemia or toxemia, placenta delivery should
cause no concern until 12 to 18 hrs.
- Uterine involution should be complete by day 28
- Lochia (a nonodorous, reddish-brown discharge) is normal for up to 3 weeks
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Parturition
The 3-30 rule Doe should be examined 30 minutes after contractions begin or after the breaking of the chorioallantoic membrane If the female is normal and parturition is progressing normally, the clinician should wait at least 30 minutes before beginning any treatments or manipulations Females should be examined 30 minutes after delivery to determine whether another fetus is still in the uterus or birth canal.
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Parturition The 3-30 rule………..
Dystocia may be complicated with :
- fatigue
- signs of pain and panting
- Uterine Inertia & Hypocalcemia (both primary or secondary to
respiratory alkalosis) => poor uterine contractility
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Dystocia
Most common cause: fetal postural abnormalities
- incomplete cervical dilation,
- simultaneous presentation of kids
- cervicovaginal prolapse
- uterine inertia
- fetal-maternal size disproportion (singleton, overly finished does)
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Goat Dystocia
Patience Clean (Ivory soap) Lube (already hydratred => KY Jelly) Light traction (very friable uterus) Gentleness Small hands
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Observations Late onset of estrus and cyclicity Low kidding rates Interruption or ‘Gaps’ in kidding Pregnancy toxemia Abortion Stillbirths Neonatal mortality RFM
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Goat Herd Health Programs • Individual Animal Identification
– neck tags, tattoos, ear tags, RFID • Management Group Identification
– temporary / permanent grouping • Record System
– herd management, – regulatory
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Goat Identification Methods Registration tattoos
Premises ID tattoos
Ear tags
Electronic ID
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• National Scrapie Eradication Program (mandatory)
• Scrapie Flock Certification Program (voluntary)
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Prioritize Disease Prevention/Control What Diseases are most prevalent ?
What Disease Kill Quickly on this farm ? (Mycoplasma, Staph/Pseudomonas mastitis, Clostridium, GIT) What kills slowly or cause early culling ? (CLA, CAEV, Johnes, Footrot)
What results in decreased production, growth ? (Coccidia, sub clinical mastitis, Pneumonia, GIT)
Are Zoonotic diseases present ? (Brucella, Clamydia, Q fever, Toxoplasmosis)
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Contageous Foot Rot
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`
“Don’t get stuck on stupid” Lt Gen R Honore, USA
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Sheep Goats and the Holy Bible Fate of Goats…………….
Then he will say to those on his left hand, “Go away from me, with your curse upon you, to the eternal fire prepared for the devil and his angels”
Mathew 25:33
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Sheep Goats and the Holy Bible Fate of Good and Holy Sheep
He will place the sheep on his right hand and the goats on his left.
Mathew 25:33 People (sheep) on the right will go to heaven… Mathew 25:34 - 40
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Internet ………….
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Organic Adj or·gan·ic (ôr-g n k) 1. Of, relating to, or derived from living
organisms: organic matter. 2. Of, relating to, or affecting a bodily
organ: an organic disease.