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.
You're probably breeding her far too soon. You need to breed her after a period of 45 to 60 days, possibly up to 80 days. If she cannot settle even after that period, or you have already tried this and failed (even though you didn't mention it in the question), then it's time to consider shipping her.
However, it may also be advisable to find out why she's not catching. Poor body condition, cystic ovaries, inadequate diet (i.e, lack of proper nutrition), uterine infection or some illness or injury that has rendered her sterile could be various issues that may be the reason she's not settling like she should.
First, monitor the calf closely to see if the cow is allowing her calf to nurse adequately - the amount and frequency will depend upon the age and health status of the calf. A 3 month old calf can drift away from his mother for 4-6 hours between feedings while a 1 week old calf should be nursing every 2-3 hours.
Second, evaluate the health status of the calf - does it have adequate condition for its age? Is it putting on weight and growing? Is it playing with the other calves and exploring its environment?
If the calf appears to be doing fine, the best thing to do is nothing - interfering with the cow/calf bond could disrupt it further or break it entirely.
If the calf is not thriving, the best option is to try to foster the calf onto another cow who lost her calf. To do this, you will need to trick the cow into thinking the orphan calf is hers - cattle farmers will often do this by collecting the dead calf's placenta or skin and placing it over the orphan calf, so the orphan calf smells like the cow's own.
If you can't foster the calf but it still needs to nurse, you can try raising it on a bottle with milk replacer; after the calf is a couple months old you can transition it to drinking milk replacer from a bucket. At about 5-6 months of age the calf should be on forage and grain (if you are planning on feeding grain) and can be weaned from the milk entirely.
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.
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 "calf".
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.
You wash a calf when you want to. You always wash a calf when you are going to show her at a fair. But you can wash her any other time too.