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Got Milk?. Chapter #7. Milk. Most wholesome & complete food Oldest agricultural industry dates back 7,000 years. 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

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Presentation Transcript
got milk

Got Milk?

Chapter #7

slide2
Milk
  • Most wholesome & complete food
  • Oldest agricultural industry
    • dates back 7,000 years
care of milk
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
dairy breeds
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)
dairy breeds7
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)
milking
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
milking12
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)
milking13
Milking
  • Calves are usually not allowed to nurse from their mother
    • bottle fed colostrum, then milk replacer or cows milk
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