It depends on the bull, as maximum age depends on the bull's temperament throughout his life, conformation, libido, and semen tests. Some bulls are only able to breed until they're around 4 or 5 years of age, other bulls are lucky to live to 10.
When the heifers are at least 14 months old, you can put yearling bulls (15-20 heifers per bull for yearlings) in with them. Don't put your big mature bulls in with your heifers as this could cause problems later on.
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.
This depends on whether that bull has already reached puberty or not. Usually the safest time to start breeding a young bull to cows and heifers is when he's at least 10 months of age.
A Holstein bull calf reaches puberty between 9 and 12 months of age, at which is the time that he starts showing interest in cows and heifers. If he's younger than that, then there's no need to worry. And, if the heifers have not reached puberty themselves (which occurs at around 12 months of age), then they will not get bred by this young Holstein bull. So no need to worry. However, you will have to pull him out before you suspect the heifers will start to show their first signs of estrus, if you intend to keep him in with the girls for a fair period of time. Oh and make sure he DOES get banded this time. It's best to band him before he reaches puberty. Most calves are banded at birth, or between 2 and 6 months of age.
Bulls can reach puberty by the time they are 8 months of age, but most are put in with the breeding herd by the time they are 12 months of age. Heifers reach puberty by the time they are 10 to 12 months of age, but most heifers are not bred until they are 15 months old. Of course the breed of the bulls and heifers depends on when they reach puberty and/or when they should be used for producing offspring.
When the heifers are at least 14 months old, you can put yearling bulls (15-20 heifers per bull for yearlings) in with them. Don't put your big mature bulls in with your heifers as this could cause problems later on.
bull trout have a maximum age of 20 years
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.
This depends on whether that bull has already reached puberty or not. Usually the safest time to start breeding a young bull to cows and heifers is when he's at least 10 months of age.
Your heifers weight should be 60% of the cow herd's. But, they should also be around 15 months of age, though a couple months plus or minus isn't going to hurt either.
A calf. If it's a male, it's a bull calf. If it's female, it's a heifer calf. Bull calves become steer calves if they are castrated. A bull calf becomes a bull when he is weaned and reaches one year of age. Bulls are raised and used for breeding cows and heifers. Steers are steers when they are fed and raised for beef. A steer can become an ox if he is trained at a young age to pull carts and wagons. A heifer calf is no longer a heifer calf after she is weaned and becomes one year of age. She is a bred heifer when she is impregnated by a bull at 15 to 18 months of age, then a first-calf heifer when she calves. She becomes a cow after having her second calf.
A Holstein bull calf reaches puberty between 9 and 12 months of age, at which is the time that he starts showing interest in cows and heifers. If he's younger than that, then there's no need to worry. And, if the heifers have not reached puberty themselves (which occurs at around 12 months of age), then they will not get bred by this young Holstein bull. So no need to worry. However, you will have to pull him out before you suspect the heifers will start to show their first signs of estrus, if you intend to keep him in with the girls for a fair period of time. Oh and make sure he DOES get banded this time. It's best to band him before he reaches puberty. Most calves are banded at birth, or between 2 and 6 months of age.
after 13 year of service
A healthy bovine can reproduce at 4 months of age, but in this industry heifers are either put out with the bull or inseminated at about 18months old. At least that's what we do :o)
Becerristas, novice bullfighters, will fight becerros, or calves - animals less than 2 years of age. Novilleros, more advanced fighters, will fight novillos or bulls from 2-4 years of age. Full matadors fight toros that are at least 4 years old. Heifers are not fought but may be tested for bravery before they are used for breeding. This is done at the ganaderias, fighting bull ranches, but not in bullrings.
Bulls can reach puberty by the time they are 8 months of age, but most are put in with the breeding herd by the time they are 12 months of age. Heifers reach puberty by the time they are 10 to 12 months of age, but most heifers are not bred until they are 15 months old. Of course the breed of the bulls and heifers depends on when they reach puberty and/or when they should be used for producing offspring.
8 to12 months