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Rolan Tripp, DVM
Canine AggressionDiagnosis
Veterinary Staff are at
increased risk for injury due
to canine aggression.
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Canine Aggression
Aggression is the most common canine behavior problem referred to veterinary behavior consultants.
The insurance industry pays an estimated $1 billion per year in dog-bite liability claims through home owner policies.
DVM Newsmagazine
Rolan Tripp, DVM 4Whittier Daily News 8-5-02
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Determine severity of bites
Left a mark? Punctured skin? Multiple rapid bites? Deep bite and thrash? Going for face or throat? Number of bites in dog’s lifetime? Any fatalities?
CDC
Data
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Comparing the Risk…
“A special kind of horror is reserved for mothers who kill their children. Susan Smith, who drowned her two young sons by driving her car into a lake became a media sensation. Unfortunately, in addition to these high-profile cases, hundreds of mothers kill their children in the United States each year”
• From: Amazon.com Editorial Review of • Mothers Who Kill Their Children
by Cheryl L. Meyer & Michelle Oberman
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Aggression
Definition…
“Violence or the threat
of violence.”
Diagnosis…
“Take a history before you take a
life.”
Determine… “Context”And Motivational Diagnosis
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25 Sub-Types of Aggression
Agonistic Barrier
Frustration Competitive Displaced Dominance Drug Influenced Encephalopathic
Epileptic Fear/Defensive Food Guarding Hormonally
Influenced Idiopathic Improperly
Socialized
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25 Sub-Types of Aggression
Irritable/Discomfort Maternal Protective Owner Protective Pack Response Pain Induced Play Escalation Possessive
Predatory Senile Territorial Trained Unintentionally
Learned
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““Brutus”Brutus” Signalment: 5 yr old, 110 lb Male Intact Mixed Breed
(Mix of - Rottweiler, Akita & Char Pei) No training or early socialization experience
Problem list: Hypothyroid; Chronic otitis externa
Presented for: Recheck ears and thyroid levels, adjust Prednisone dose. Restrained by owner w/ pronged pinch collar
Problem: Cannot be handled, barks and threatens anyone entering exam room. Growls at owner’s attempts to calm.
Other: Previous painful experiences; doesn’t like Bob. Ms brings treats in a Ziploc as requested.
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What sub-types of aggression does “Brutus” have?
Agonistic Barrier
Frustration Competitive Displaced Dominance Drug Influenced Encephalopathic
Epileptic Fear/Defensive Food Guarding Hormonally
Influenced Idiopathic Improperly
Socialized
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Irritable/Discomfort Maternal Protective Owner Protective Pack Response Pain Induced Play Escalation Possessive
Predatory Senile Territorial Trained Unintentionally
Learned
What sub-types of aggression does “Brutus” have?
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Aggression Dx for Brutus
Agonistic Barrier
Frustration Drug Influenced Dominance Fear/Defensive Food Guarding Hormonally
Influenced
Improperly Socialized
Irritable (Discomfort)
Owner Protective Pain Induced Territorial Unintentionally
Learned
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Impulse Dyscontrol Aggression
Anxiety or Dominance related
Lack of Warning
Unpredictability (O point of view)
Lack of Inhibition = serious attack
May be called, “Rage Syndrome.”
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Aggression in the Hospital
Defends the exam room
Defending owner
Fearful in exam room
Owner can’t apply a muzzle
Barking in the reception area
Male Urine Marking
Backed into kennel.
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Preventing Aggression
Raising a gentle adult dog
begins with socialization
and gentle
handling as a puppy.
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Summary
Diagnosing aggression depends on a careful history, and
analysis of the context of the conflict.
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www.AnimalBehavior.Net
Animal Behavior Network Membership
“Pet Perception Management” ManualRolan Tripp, DVM
Ph (800) 372-3706
Additional Resources
