First of all, look at whether there is any trauma to the body and limbs and whether the walking posture is normal. Healthy kittens have bright eyes and are full of vitality. Lively and active, you won't be sick all the time.
Whether it is a kitten or a puppy, the nose is wet when it is healthy. Then look at the ears. The ears must be clean to prove that there are no ear mites.
In addition to direct visual inspection, it is recommended to go to the pet hospital for a comprehensive examination and use test paper to detect whether there are infections such as cat plague. It is necessary for doctors to carefully check whether there is cat moss, which is contagious. Finally, don't forget to get vaccinated, so the examination will be comprehensive.