1 Records created or received by an individual, family or organisation (such as a government, cultural association, company or university) during its existence and selected to be kept permanently because they are considered to be of continuing value to society. 2  Unique and irreplaceable.
In domestic dogs, sexual maturity (puberty) occurs between the ages of 6 to 12 months for both males and females, although this can be delayed until up to two years of age for some large breeds. Pregnancy is possible as soon as the first estrus cycle, but breeding is not recommended prior to the second cycle.
Often a bull should stop breeding either if he's too old and not fertile enough any more to be used, or if he's become too aggressive and dominant with his handlers to be considered a keeper anymore. There really is no defined age when a bull should stop breeding.hat age can you breed a pit bull male? Technically you could breed a male dog starting at about 9 months of age. However, this is a very bad idea-the dog has not finished growing yet and you don't know if he has â¦ bad conformation or traits yet either. Ideally you wouldn't breed a dog until he is at least 3 years old.