Healthy kittens have bright, clear eyes, no foreign objects in the corners of the eyes, and no redness or tears in the eyes. There are no ear mites in the ears, the nose is cool and moist, the teeth are strong and white, and the gums, tongue and palate are pink. The cat's mental state is very good, and there is no abnormality when touching the cat's body and hair with a comb or both hands.

The hair on the back of healthy kittens is also very soft and thick, and does not appear similar to alopecia areata. Healthy kittens are very energetic and will respond quickly to toys. Moreover, kittens have very strong reflexes and can move very quickly.

Healthy kittens will take the initiative to defecate, and the shape of their feces will be normal. If a kitten has abnormal defecation, such as soft stool, diarrhea, constipation, abnormal stool color, blood in the stool, etc., it is likely to indicate that the cat has kidney-related diseases, diabetes or other problems.