How to distinguish healthy from unhealthy when buying a dog in a pet shop?

1. Dogs with good posture and manners are lively and active. Sick dogs are often depressed or excited. Holding it is more important than it looks.

2. Look at the eyes, the conjunctiva is pink, no tears, no secretions.

3. Look at the nose. In general, the dog's nose is wet and cold, without mucus or thick secretions. If the nose is cracked or sticky secretions accumulate, the situation is not good.

4. Looking at the mouth, the healthy dog's mouth is pink, with no peculiar smell, bright red tongue and no moss, and white and neat teeth. Occlusal rules.

5. Touch the fur, the fur is warm but not hot, fluffy and tidy, the fur color is fresh, flexible and not slack. But it's not too dry and wet, and it's not depilated. There were lice when I looked through it.