How old can dogs have puppies dogs generally to about 15 months can have puppies, because then the dog will reach sexual maturity and physical maturity, sexual maturity before having the function of mating, but if the size of the smaller dogs, under one year is not recommended to give birth. Mating occurs after the dog has reached physical maturity, and premature birth may result in a poor survival rate of puppies and can be harmful to the older dog. Avoid overbreeding, the dog’s fertility is very strong, the number of offspring can be geometric growth, so if you can not afford to raise too many puppies, the dog should be spayed or neutered in a timely manner.
