1. Personality: Lively and active, running and jumping movements are flexible and smooth, walking without shaking, and can stop after normal play. There is no sudden biting, manic, frantic jumping, and hitting the cage. If the standard gray chinchilla suddenly hits the cage, it cannot be selected.

2. Appearance: standard grey chinchilla body capillary, dense, uniform, blown After opening, there is no exposed skin or dandruff, and the tail hair is thin and hard. No smear around the eyes, no redness. If there are obvious defects in appearance, it cannot be selected.