[Lio]

I'm neither vegan nor vegetarian but in order to have a female cow produce milk regularly you need to cycle it through pregnancy.

So the question is what happens to the calves?

Well the females go on to be milk cows but males calves are raised just long enough to be slaughtered.

If the male is particularly unlucky it will become a veal calf, which I'm sure you'll agree is not a great life.

If the male cow is "lucky" it will be castrated and allowed to grow into a bullock (British terminology, known as a steer in USA).

Very rarely a male calf will be raised breeding but it's a pretty small chance.

So milk.

In the case of egg laying hens, most male chicks will go off to be gassed as they have no commercial value.

So eggs.

[ianai]

Gassing may be one option. Another thigh is simply grinding them alive.

[Lio]

I guess that would depend on where you live. In the UK that would not be legal.