Do cows always lactate?

Question

Because I was thinking, they are mammals, right? Just like us humans, we are only lactating when we have a child, so do they give them a special hormone to keep them lactating?

If they did, wouldn't that be bad for humans?

I'm really confused.

Answer 1

a cow must have one calf in order to lactate after that they lactate for the rest of their lives.

Answer 2

No . They become what is called fresh( lactation) at the birth of a calf continue to produce milk up to about three months before the next calf, then go dry until the cycle recommences

Answer 3

Cows are kept pregnant to produce milk. Calve are born, removed and put into small pens alone or put into tight veal boxes. Sometimes a lucky male calf gets to be a bull someday. The females end up as milkers when they grow up.