The dog’s desire to eat will decrease when it is in estrus for the first time. A small amount of secretion will flow out of the dog’s vulva. It will be colorless at first, then it will appear bloody, and then slowly disappear. This is usually the first time the dog is in estrus. It is not recommended for female dogs to mate. You should wait until they are in heat for the second time before mating. This will be beneficial to the health of the female dog.

Tip:

Mating a female dog about two weeks after she is in estrus has a greater chance of pregnancy. Parents should choose a male of similar size when mating a female dog. For dogs, nutritional supplementation after successful pregnancy cannot be too great to avoid dystocia.