[Cory E]

Hi there.

Teeth Chattering is completely normal with dogs at some instances. In the case of your dog, he seems to be manifesting his emotions through chatteriing. It seems that he is expressing his excitement as he waits for his food and before he goes outside. You’ll find other reasons for dog teeth chattering here: https://goldenretrieverlove.com/why-do-dogs-chatter-their-teeth/