What causes a dog’s mouth to quiver?
A dog’s jaw will quiver for a plethora of reasons. He can be excited to see you, smell or taste something, or be warding off a possible threat. He can be struggling with anxiety or oral pain. He could also have one of several disorders which cause quivering and tremors throughout his body.
Why does my dog’s bottom jaw chatter?
Your dog may be overstressed or become nervous easily, and may chatter his teeth together or his jaw. Anxiety can occur due to a stressful home environment, a thunderstorm or fireworks, other loud noises, or when around unfamiliar dogs. If your dog is cold, his teeth may chatter.