Why do dogs’ teeth chatter?

Dogs’ teeth chatter because they are too cold

The dog may have a cold, or be in a low temperature environment for a long time, and the shaking of the body will touch the teeth. Shiver. Owners should pay attention to keeping their dogs warm and pay attention to whether their dogs have runny noses or other adverse symptoms.

Chattering of a dog’s teeth means aggression

When a dog encounters a hostile dog or is angry, its entire body will arch up, making a whining sound, and its teeth will chatter.