Second, look at the appetite, see if the dog has an appetite, how much to eat, whether he is picky about food or refuses to eat. Healthy dogs have a big appetite and are excited every time they are fed. They eat fast, eat steadily and are not picky about food. Sick dogs, on the other hand, have poor appetite, eat less, like to drink cold water or clear water, and choose or refuse to eat.
Third, look at vomiting, whether the dog vomits after eating or when cleaning the dog's food. You should also check the color, sex and content of vomit. Healthy dogs don't vomit. Only dogs with infectious diseases or gastrointestinal diseases will vomit.
Fourth, look at the feces mainly to see the shape, color, nature and contents of dog feces. No constipation and diarrhea, no special smell in feces. Healthy dog stools are strip-shaped and moist. The color depends on the food, and there is no special smell. If the dog's feces are thin and soft, bloody and smelly, or dry and hard, the amount is small. These are the characteristics of a dog's illness.
Fifth, look at the posture, see if there is any abnormality in the posture of the dog standing, lying down and waiting, and whether there are symptoms such as limping and stumbling during exercise. A healthy dog is natural and brisk, and can obey orders when doing various postures. The sick dog, on the other hand, does not execute the password, and its posture is unnatural, and its expression is painful when it is forced to execute the command.