Generally, dogs will return blood within 2-3 days of breeding. This is a normal phenomenon and owners do not need to worry too much. Generally speaking, dogs will bleed after breeding, which means that the breeding has been successful. If the amount of bleeding is relatively large and the color of the blood is particularly dark, then special attention should be paid. It is very likely that there is a gynecological disease. It is recommended to take the dog to the hospital for examination.

Notes on dog breeding:

1. In terms of exercise, do not let the female dog do strenuous activities and reduce the amount of exercise the female dog does.

2. The owner should feed the female dog puppy food or pregnancy food, which can provide sufficient nutrition to the female dog and fetus and allow the fetus to develop healthily.

3. The environment when breeding a dog is more important. Choose a quiet place. There should be no outsiders except the owner, and no other dogs to avoid distraction.