Yes, they are mammals and all mammals have mammillary glands that produce milk. Humans call theirs breasts.
Yes.
There's a breed of Moose that Europeans call an Elk. [see: European Elk (not Canadian Elk)]
No, a cod does not give its young milk. Only mammals give milk to their young, and the cod is a fish.
About ten days.
Yes, you have to be pregnant in order to give milk.
No, don't give them cow's milk.
They give milk, yes, but they have to have been mated. They have to have had at least one kid to give milk to before they start producing milk. But if their udder is bulging they may have pre-milk, which is to prepare them.
No to be a mammal you have to give live birth. If they live birth they have to give milk.
They give thick milk after birth, the milk is high in nutrients, which vital for the young.
no the dolly sheep never give us milk
Water. Cow's milk can give a cat diarrhea.
Crocodiles do not give milk, meat or eggs.