95 percent of the time they are, they are called Freemartins
No. Only a heifer calf twinned to a bull calf will be infertile, not twin heifer calves.
No. A heifer would only be sterile if she was twinned with a bull calf.
Only if the twin is a heifer and if that twin has been tested negative for being a freemartin (IF she had been twinned with a bull calf). Twin heifers are both highly likely to get pregnant when they reach puberty.
Yes.
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. Only a heifer calf twinned to a bull calf will be infertile, not twin heifer calves.
No. A heifer would only be sterile if she was twinned with a bull calf.
It doesn't work that way. A heifer calf is only infertile if she is twinned with a bull calf and if her and that bull calf share the same placental tissues. In most cases such twins are fraternal, but simply stating that fraternal twins versus maternal twins are more prone to infertility than the other is stating falsehoods.
Only if the twin is a heifer and if that twin has been tested negative for being a freemartin (IF she had been twinned with a bull calf). Twin heifers are both highly likely to get pregnant when they reach puberty.
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.
Yes.
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.
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].
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!!"