1. Got Milk? Original Power Point Created by Casey Osksa
Modified by Georgia Agricultural Educational Curriculum Office
June 2002

2. Milk Most wholesome & complete food Oldest agricultural industry
dates back 7,000 years

3. Care of Milk Milk is easily contaminated with bacteria
udder is close to ground
Cows can carry Brucellosis
causes undulant fever in humans
cows are tested each year
Pasteurization: heat to 161 degrees F for 15 seconds
kills bacteria

4. Dairy Breeds Holstein: most popular breed in U.S.
largest breed
most milk production
lowest butterfat in milk
black & white
Jersey: smallest breed , light brown color
least milk
most butterfat
fat on meat is yellow (butterfat)

5. Holstein (Dairy)

6. Jersey (Dairy)

7. Dairy Breeds
Guernsey: milk is yellower due to high content of carotene
Ayrshire: newest breed, looks like Holstein but red & white
good foragers
Brown Swiss: oldest breed, dual purpose breed (meat & milk)

8. Guernsey (Dairy)

9. Ayrshire (Dairy)

10. Brown Swiss (Dairy)

11. Milking
Dairy cows require lots of high quality feed, lots of concentrates & water
Dairies milk 2-3 times / day
udder is washed & dried
primed by hand
milking machine pipes milk to a cooling tank
dip teats in iodine to disinfect & close sphincter muscle

12. Milking
Any cows treated with antibiotics, milk is not suited to humans
can cause a whole truck of milk to be dumped out due to contamination
Lactation period = 10 months, dry = 2 months
Freshen: cows calve and begin to lactate
Colostrum: mothers first milk, loaded with antibiotics etc. for the calf
first 3 days milk from a cow can’t be fed to humans (feed to calf)

13. Milking Calves are usually not allowed to nurse from their mother
bottle fed colostrum, then milk replacer or cows milk