Giver her a dose of oxytocin to give her a kick-start to start lactating. Also give the calf a bottle of colostrum (or tube him if he's too weak to start suckling) immediately after he's born. If the cow is still not lactating, then you need to start bottle-feeding the calf regularly until either the cow starts producing enough milk for the calf, or until you have to wean him from the bottle.
Yes, particularly in beef cow-calf herds.
The name of a baby cow is a Calf
The baby is called a calf and mother is a cow. Together they are called a cow-calf pair, or "mom and baby."
A cow and calf should not be separated unless you are weaning them. Thus, if you are asking about weaning a cow from her calf and vice versa, you should keep them separate for at least 6 to 8 weeks, longer if the calf tries to go back to suckling his momma again when you put them back together.
Cow. Calf came after.
A "calf".
It depends. Is she a beef cow or dairy cow? Are you wanting to keep the cow with the calf or separating the calf from the cow? Usually with beef cows you don't bother with milking them unless you have to because the calf isn't up and suckling soon after birth and you want to encourage the calf to be up and suckling, or to get some milk from a cow or heifer that won't accept her calf right away to feed that calf with. With dairy cows, though, if you've separated the calf from the cow right away, it's ideal to milk that cow to collect the colostrum to feed that calf--and other calves--to the benefit of the calf's health. But, if you are wanting to keep the calf with the cow for a couple of days, then no, it's not necessary.
A newborn calf, a baby calf or just a calf.
The best thing you can do is to skin the dead calf of that beef cow's, and drape it over the orphan calf's body so that you trick the cow into thinking that that calf is hers. But this will only work if you have that cow's dead calf on hand and not if that cow doesn't have a calf or if you're wanting to put another calf on that cow. Other tricks include smearing cod liver oil or perfume or some other strong-smelling solution that's not poisonous to the cow nor calf over the cow's nose and all over the back and head of the calf, putting a dog in with the cow and the calf, etc.
The mothering ability of a cow is a term that means how fast that cow (or even heifer) is able to bond with her calf and accept that calf once born. It is a term that encompasses the protective ability and maternal instincts that a cow should have upon having her calf, and is a term that is used in regards to beef breeding herds. A cow with strong mothering ability is a cow worth keeping, but a cow that is protective over her calf towards people is one to be very careful about.
A young cow, in the sense of it being female, is called a heifer. Heifers remain so until they have had a calf. However in the more general sense, a young "cow" is called a calf.
The offspring of a cow is referred to as a calf. A heifer calf is a female calf, a bull calf is an intact male calf, and a steer calf is a castrated male calf (castrated after birth).