The strain of producing enormous amounts of milk

The natural lifespan of a cow is up to 20 years, yet few cows live beyond the age of seven years, and many younger animals go to slaughter.
Selective breeding, and more recently genetic manipulation, has resulted in the selection and production of cows which produce enormous amounts of milk.  The modern dairy cow can produce about 35-50 litres of milk per day—about ten times more milk than her calf would need
Milking MachineProducing large quantities of milk puts a significant metabolic strain on the animal.  The great weight of the udders often causes painful stretching or tearing of ligaments and frequently causes foot problems, such as laminitis.  These foot problems can be associated with significant pain.  Dairy cattle are also susceptible to infections of the teat and udder (mastitis) - this can be very painful.
The milking machine itself may render the cow more susceptible to infection. The front teats may be subjected to vacuum pulsing for up to two minutes after the quarter has been emptied and while the hind teats are still yielding. This is believed to be painful for the cow, and may also weaken tissue.  The nature of the vacuum milking process is known to increase the possibility of infection.

date Saturday, 24 December 2011

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