It is possible to breed older dogs to puppies, but this is not recommended. In fact, mating is not not allowed, but it is technically difficult. If the female dog is a puppy and the male dog is a big dog, then considering the safety of the female dog, she is likely to die in childbirth. If you must breed, it is recommended to consult a professional. Give help. In order to prevent future accidents between the mother and the puppies, it is not recommended to breed dogs with large differences in size. It is best to breed dogs with similar sizes.

Things to note when breeding dogs:

1. Be familiar with the breeding partner. Find a good partner before the dog goes into heat and let them get familiar with each other and meet appropriately, but not too much.

2. The environment is quiet and clean. Breeding should be carried out in a quiet and clean place. Except for the dog owner, other people should not be allowed to watch or make noise.

3. Avoid human interference. During the mating process, the tails of the two dogs will be connected. Do not move them at this time to avoid injury to the dogs or people.

4. Pay attention to rest after breeding. Do not drink water or engage in strenuous exercise immediately after breeding. The male and female dogs should be allowed to return to the kennel for a short rest.