1. Spring--is the season of estrus, mating, breeding and moulting of dogs. Pay attention to the management of dogs in heat, groom their coats, and prevent skin diseases. During estrus, dogs often experience some special changes in their physiological functions and behaviors. Bitches in estrus will walk around, and they should not be taken care of well, and they should not be allowed to go out and mate freely, especially good purebred dogs, to prevent breed from degenerating. Male dogs often fight for mates and are prone to injury. If they find the injury, they should deal with it in time. －Spring is also the molting season. The thick winter hair will fall off. If it is not combed in time and often, the unclean skin will cause itching. The dog will scratch and rub the body to eliminate the itching, which will easily break the skin and cause bacterial infection. Dirty coats are easy to roll out and provide a favorable place for the reproduction of external parasites and fungi, causing skin diseases. Therefore, attention should be paid to the grooming and cleaning of the coat in spring to prevent skin diseases. 2. Autumn---In autumn, dogs have strong internal radiation, increased appetite, and increased feed intake. Summer hair begins to fall off, and autumn hair begins to grow. At the same time, it is the second breeding season of the year. Its management approach shares many similarities with Spring. The food is abundant in autumn, the food intake should be increased, the quality should be improved, and physical reserves should be prepared for the winter. Pay attention to grooming to promote winter hair growth. In the late autumn, the temperature difference between day and night is large, and the insulation work of the kennel at night should be done to prevent colds. 3. Winter--The weather is cold, and the management should focus on preventing cold and keeping warm and preventing respiratory diseases. Due to the drop in temperature, the body is attacked by cold air, or due to improper management, not paying attention to cold protection and heat preservation, being exposed to rain and wind after exercise, and the dampness of the kennel will all cause colds, and serious respiratory diseases such as bronchitis and pneumonia will occur. Effective measures to prevent colds are to prevent cold and keep warm, thicken mattresses, and replace them in time, keep them dry, and prevent thieves; when the weather is warm, people should exercise outdoors to enhance physical fitness and improve disease resistance. Sunbathing in the sun can not only keep warm, the ultraviolet rays in the sun also have the effect of disinfection and sterilization, and can promote the absorption of calcium, which is conducive to the growth and development of bones, and prevents rickets from occurring in young dogs. Four. Summer--The air is humid and the climate is hot. Attention should be paid to preventing heatstroke, moisture and food poisoning. In an environment with high temperature and high humidity, dogs are prone to heat stroke due to the difficulty in dissipating body heat. For this reason, activities under the hot sun should be avoided, the kennel should be located in a shaded place, and the dog should be bathed in cold water frequently in hot weather. When it is found that the dog has symptoms such as difficulty breathing, increased skin temperature, rapid heartbeat, etc., you should quickly apply a cold compress to the head with a wet and cold towel, move it to a cool and ventilated place, and immediately ask a veterinarian for treatment. In order to prevent moisture, it is necessary to change the bedding frequently, frequently to dry the bedding, etc. After washing the kennel with water, it must be thoroughly dried before entering the dog. After the dog is wet by the rain, it should be dried with a towel in time. --The feed for dogs in summer is prone to filial piety and deterioration, which can easily cause food poisoning. Therefore, the best food for dogs is fresh food that has been heated and treated to prevent cold, and the amount of feeding should be appropriate, and there should be no excess. We must resolutely discard the spoiled food, and we cannot keep it for fear of waste. Because spoiled food may contain bacterial toxins, it is impossible to destroy it even with high temperature treatment. Dogs eat food containing toxins, can cause food poisoning, if not treated in time will lead to death. Therefore, whenever the dog is found to have vomiting, diarrhea, and general weakness shortly after feeding, you should immediately seek medical treatment from a veterinarian. --The temperature is high in summer, which is prone to loss of appetite. At this time, meat should be reduced, fresh vegetables and broth should be increased, or the type of feed should be appropriately changed, and more water should be supplied. In addition, regular attention should be paid to cleaning eyes and ears to prevent skin eczema.