> Not denying it but in order for a cow to produce milk, it has to give birth to a calf every year.
Just once, not every year. The cow have to be pregnant to start making the milk, but if you keep milking the cow, it will keep making the milk. The cow however does not have to have calf every year.
Not true, a cow starts to make milk not when it becomes pregnant, but on delivery. The milk production declines in time and stops completely about the time the cow is pregnant again.
Just once, not every year. The cow have to be pregnant to start making the milk, but if you keep milking the cow, it will keep making the milk. The cow however does not have to have calf every year.