Unit 10Unit 10Dairy ScienceDairy Science

Major Uses of Dairy Major Uses of Dairy CattleCattle

U.S. Average DairyConsumption

28.8 gallons of milk26.8 pounds of cheese16 pounds of ice cream

4.3 pounds of butter4.3 pounds of yogurt

Milk ProductionMilk Production

• Selective Breeding– Choosing superior livestock to

fill herds to improve genetics

• BST Hormone– Naturally occurring– Increases milk production– Controversial

• Feeding Systems– Grazing– Lots

Milking Steps

1) Cow enters the parlor

2) Udder is cleaned and dried

3) Milking machine is attached to the teats

4) Cow is milked

5) Cow is disinfected and released to her pen

Dairy ProcessingDairy Processing• Milk

– Carefully tested– Pasteurized– Separated into cream and skim

portions• Cheese

– Americans eat 25 lbs. per year– Bacteria culture is added for

fermentation– Rennet is added to speed the

process– Ripens at specific temperature

and time