>>561186I have worked in a dairy and those cows live a whole lot longer than five years. The reason other animals don't drink milk into adulthood is because they can't get it from their mothers anymore. Any mammal will guzzle down milk you give them, even as an adult. It's super nutritious and delicious. Oh and dairy cows have to be milked or they get a mammary gland infection and die. Those cows rush into the line because they are heavy with milk. Try getting your information from a reliable source next time.