That depends on the breed. Usually heifers should be bred when they are between 15 and 18 months of age, and bulls can be used for breeding when they are around 10 to 14 months of age.
Brangus heifers reach sexual maturity at around 15 months of age, so this is a good time to breed them. Brangus bulls can be used by the time they are yearlings (~12 months of age).
Holstein heifers can be bred at around 15 months of age. Bulls can be used for breeding by the time they reach around 12 months of age.
Cattle will begin puberty as young as 4 to 5 months of age and reach sexual maturity at about 1 year or 12 months of age. Naturally this depends on the breed and the genetics of the cattle herd itself. Some breeds will have bulls and heifers beginning puberty at 8 to 9 months, or even later, at 10 to 12 months. Such animals may not reach sexual maturity until 15 to 20 months of age, respectively, or more.Note that age of puberty to rate of maturity is like comparing apples to oranges: they are two different traits, one is not affected by the other.The average at which cattle reach puberty is about 11 to 13 months. Generally, a heifer is able to breed successfully at about 18 months. A bull can successfully breed at about the same age.
Usually at the age of two, however, they will show heat cycles before then. Most farmers start breeding females timed to have the first calf at the age of two and most bulls depending on size can start to breed around 2.
Bazadais is a French breed of cattle. See related link below.
They should be bred so they calve when they are two, you can breed them around 15 months of age, if they are showing healthy heat cycles and are at a healthy weight.
That all depends on what country you are referring to, and what type, age, and breed these cattle are.
The Canadienne. Cattle (of unknown breeding) from Normandy and Brittany where imported to Canada in the 16th and 17th centuries to create a breed known as the Canadienne. Thus the Canadienne breed was the first breed of cattle that was "imported" and created in Canada.
The first American-created breed of beef cattle would be the Texas Longhorn and also the Florida Cracker/Pineywoods cattle. Both breeds descended from the Spanish cattle that were imported from Spain in the late 1400's.
A Guernsey is a breed of cattle, particularly dairy cattle.
Jersey.
Brangus heifers reach sexual maturity at around 15 months of age, so this is a good time to breed them. Brangus bulls can be used by the time they are yearlings (~12 months of age).
Cattle is the word to describe a group of bovine, while cow is a mature female bovine that has had at least two calves.
Holstein heifers can be bred at around 15 months of age. Bulls can be used for breeding by the time they reach around 12 months of age.
A zo is a Tibetan breed of cattle. The zo is a cross breed of a yak and the common cattle.
The Angus breed.
The Angus is a breed of cattle