Correctly grasp the timing of female dogs' estrus, perform animal B-ultrasound examination, and breed at the right time. It is necessary to strengthen the professional training of breeders, understand and master the breeding timing of different types of dogs and dogs of different ages, breed at the right time, and observe the changes of female dogs every day after estrus. Breeders, especially breeding personnel, should carefully observe each female dog, and it is best to use animal B-ultrasound examination. According to the estrus rules of female dogs, predict the estrus time of female dogs, carefully examine the estrus female dogs, observe and grasp the estrus symptoms, and breed at the right time according to the breeding plan and the rules of each dog. Artificial assistance should be provided for dogs that have difficulty in free mating. It should be noted that the mating time of female dogs should be determined according to the specific situation of the female dogs' estrus, and cannot be simply calculated according to the time of blood drop discovery. The specific method is to observe that the blood flowing out of the female dog's vulva becomes light red and slightly sticky, the vulva is swollen and shiny, and its base becomes soft. At this time, mating is possible, which is about the 9th to 13th day of estrus, slightly earlier for older dogs and slightly later for young dogs. This is a clinical observation method for identifying estrus ovulation, which is also more obvious in animal B-ultrasound. Secondly, there are also methods such as dog ovulation detection instruments. Note that the male dog should preferably be a stud dog that has not mated with a dog for about a week.

The feeding and management of female dogs should also adopt scientific methods. First, pay attention to the management of the anestrus period. The anestrus period of female dogs is a rest and recovery period after pregnancy and lactation. During this period, the feed variety should be sufficient and the nutrition should be comprehensive. The free-range exercise should be strengthened, and the free-range exercise should be not less than 1 hour a day. Units with conditions should strengthen training, enhance the physical fitness of female dogs, promote the recovery of the female dog's body and the regulation of endocrine, and promote the normal estrus of female dogs. Animal B-ultrasound should be used frequently to check their conditions. The second is to manage pregnant female dogs. In order to meet the mother dog's own physiological needs and the growth and development of the fetus during pregnancy, it is necessary to provide high-protein and comprehensive nutritional feed. At the same time, attention should be paid to the supplementation of vitamin AD and trace elements (calcium, etc.), and Animal B-ultrasound examination should be performed to ensure the normal development and growth of the fetus. In the later stages of pregnancy, small meals should be fed frequently, and attention should be paid to nutritional balance. In terms of management, the kennel for pregnant dogs should be kept clean and dry, with smooth air flow and a quiet environment. While exercising appropriately, the dog should have enough rest to prevent strenuous exercise and avoid miscarriage and premature birth.