Consult an expert, want to have a dog, summer, want to know how to judge whether a dog is healthy or not? I've read all these on the internet.

When buying a dog, the dog owner must be required to show his vaccination certificate or "health certificate". Health card is the time, place and type of immunization or disease treatment.

Try to buy dogs from acquaintances and dogs from merchants. After long-distance trafficking, most of them carry infectious diseases and viruses. It is difficult to judge latent infectious diseases simply by visual inspection.

Before buying a dog, you can buy your own vaccine and inject it into the dog owner's home. You are required to pick up the dog after half a month. In case of death, the dog owner can bear part or all of the losses through agreement.

This is my personal experience, which may inspire you.