Check the spirit
See whether the dog's spirit is active, whether its reaction to the outside world is normal, whether there is any abnormality, etc. Healthy dogs are lively, agile, wagging their tails frequently when seeing their owners, and are responsive to external stimuli. If the dog's head seems to be drooping, its expression is cold, it stands still or huddles in a corner, and it is slow to react, it is a sign of illness.
Appetite
Check whether the dog has appetite, how much it eats, and whether it is picky or refuses to eat. Healthy dogs have a strong appetite and are very excited when feeding. They often circle around their owners, eat quickly, have a relatively stable food intake, and are not picky or picky. Sick dogs have loss of appetite, reduced appetite, like to drink cold or clear water, pick food or refuse to eat.

Check for vomiting
See if the dog vomits after eating, or if vomit is found when cleaning the kennel. And pay attention to the color, shape and contents of the vomitus. Healthy dogs do not vomit. Only dogs with infectious diseases or gastrointestinal diseases will vomit.

Looking at feces
Mainly observe the shape, color, nature and contents of dog feces. Is there any constipation or diarrhea? Does the feces have a special smell? A healthy dog's stool is strip-shaped, moist, and the color depends on the food. It can be yellow, yellow-green or brown, etc., and has no special odor. If the dog's feces is loose and soft, has blood in the feces, has a foul odor, or is dry and hard with a small amount, etc., these are the characteristics of the disease.

Look at the posture
Look at the dog's posture when standing, lying, sitting, etc., to see if there are any abnormalities, and whether there are any symptoms such as lameness, staggering gait, or limb paralysis during exercise. Healthy dogs make various gestures naturally and briskly, and can obey commands. Sick dogs, on the other hand, are less likely to follow commands, their various postures are unnatural, and they show signs of pain when they are forced to carry out commands.