Reasonable weaning method for mother dogs. Puppies are generally weaned at around 45 days old. Most puppies will have stress reactions in the early stage of weaning. This period is a critical period when puppies are difficult to raise, have high incidence and high mortality. Therefore, scientific weaning is crucial to improving the survival rate of puppies. It is necessary to use animal B-ultrasound to check the gastrointestinal function of puppies. Weaning can be done in batches. Strong puppies are weaned first, and weak puppies are weaned later. It is not advisable to wean suddenly at one time during weaning. The method of gradually reducing the number of breastfeeding and increasing the number of feedings should be adopted. The mother should be consciously separated, and the separation time should be gradually extended. Generally, it can be completely weaned in 4-5 days, and animal B-ultrasound should be used to regularly observe its condition. Carefully feed puppies. Puppies that have just been weaned often appear restless and have poor appetite due to environmental changes. They are prone to illness and death. It is necessary to use animal B-ultrasound to check them regularly. Therefore, for newly weaned puppies, it is necessary to choose feed that is palatable and easy to digest. The feed can be composed of milk, broken rice, lean meat, eggs, vegetables, bone meal, etc. to ensure sufficient protein and vitamins. Animal B-ultrasound is used to check the development of its digestive system. Feeding should be done at regular times, quantitatively, by fixed personnel, and with fixed utensils. The feed should be kept fresh and small meals should be eaten frequently. At the same time, attention should be paid to timely supply of clean drinking water to puppies, and their exercise should be increased appropriately to improve their resistance to diseases. Deworming and epidemic prevention should be carried out in a timely manner. The timing of deworming and immunization should be arranged according to the physiological development of puppies. Under the premise that the puppies are healthy, the first deworming should be carried out when the puppies are 20 days old. Generally, levamisin or propylthiocarb can be taken orally. Deworming should be carried out every 15 days thereafter, for three consecutive times, and once every six months thereafter. Animal B-ultrasound should be used frequently to check the liver condition of puppies.