Breeders whose dogs are deficient in calcium can purchase pet liquid calcium, pet calcium tablets, chondroitin and other related drug supplements, or make their own bone soup, feed bones, bone marrow, etc. to supplement their dogs' calcium through food. During the growth period of dogs, a large amount of calcium will be lost in the body, which will cause problems such as fragile bones and double rows of teeth. At this time, breeders should pay attention and replenish calcium and nutrients for their pets in a timely manner.