This is the wrong question to ask, actually. You should be more concerned about the age that you should put a heifer in with a bull to be bred, not when should a heifer be taken away from a bull. See the related question below, but generally, a heifer should be at least 15 months of age to be bred and be able to grow a calf in her.
Now to really answer your question, the bull should be removed after a couple months of being in with the heifer[s].
No. The bull should be separate from the heifer and her calf simply because it's less stress for her and enables her to mother up to her calf without having to be getting after the bull if he tries to interfere with her.
No. Only a heifer calf twinned to a bull calf will be infertile, not twin heifer calves.
It should be a more of a concern of how much the bull weighs over his age. The bigger the bull, the more likely he'll cause injury to the heifer. Usually the older the bull is the bigger he'll be. Yearling bulls are best used for heifers, more often those that have EPDs for small calves. Brahmans are typically later maturing, so a two-year old bull may be old enough to service a heifer.
cow, or heifer
Don't do it if the bull's way too heavy for the heifer and you can't get semen from him sufficiently to AI her. Most herd bulls are mature beasts, but if he's a yearling or a small bull, then go right ahead, put her in with him.
No. The bull should be separate from the heifer and her calf simply because it's less stress for her and enables her to mother up to her calf without having to be getting after the bull if he tries to interfere with her.
You could call it a heifer, or a twin heifer if the sibling is also a heifer, or a freemartin if the heifer's sib is a bull calf.
The masculine form of heifer is bull. All baby cows, prior to sexing are referred to as calves. A castrated bull is called a steer.
The male counterpart of a heifer would be a bullock or a young virgin bull.
No. What a heifer or any female eats as no effect on her reproductive cycling or her receptivity to the bull. A heifer that is bred is a heifer that is not nor will not come into heat for several months.
No. Only a heifer calf twinned to a bull calf will be infertile, not twin heifer calves.
It should be a more of a concern of how much the bull weighs over his age. The bigger the bull, the more likely he'll cause injury to the heifer. Usually the older the bull is the bigger he'll be. Yearling bulls are best used for heifers, more often those that have EPDs for small calves. Brahmans are typically later maturing, so a two-year old bull may be old enough to service a heifer.
A calf is a heifer calf if it's female, a bull calf if it's male.
Like this:"The farmer had a prized heifer in the cattle shed.""The heifer was bred by the herd bull yesterday.""The cow gave birth to a heifer calf!""Those blasted heifers got out again!!"
cow, or heifer
Put a calving-ease yearling bull in with her.
Bull calf, heifer calf.