A wether.
"Male cows" castrated before reaching sexual maturity are called steers.
A male horse castrated before reaching sexual maturity is called a gelding. A male horse that is sexually mature is called a stallion.
A one-testicled bull is still called a bull. When he is castrated after reaching sexual maturity, he is called a stag.
Steers going to market don't need to waste energy and lose fat by being distracted by natural urges to reproduce.
It is still called a wether but if it is older than six months of age, in some countries, the castration can only be performed by a veterinarian and under anaesthetic.
Male wallabies usually obtain sexual maturity at 2 years of age. Females, however, obtain sexual maturity a few months before that.
Sexual maturity is the age or stage when an organism can reproduce. This is called progenesis, in which sexual development occurs.
Depending on overall condition, at 6 months.
Puberty
A castrated buck goat (male) is called a wether.a wetherAs with sheep, a castrated male goat is called a wether.
An "altered" (or fixed, castrated, neutered or spayed) female bovine is called a spayed heifer or spayed cow. In 99% of all cases such animals are called spayed heifers since most females that are going to be spayed are done so before they reach sexual maturity.
Heifers reach sexual maturity by 10 to 12 months of age, though this depends on the breed. Bulls reach sexual maturity around 8 to 9 months of age, though this too depends on the breed. Late maturing breeds reach sexual maturity later than average (10 to 12 months); Early maturing breeds reach sexual maturity earlier than average (7 to 9 months).