[Edit] 
If this is a male dog that has not been neutered, it could mean there is a female in heat somewhere in your area.
First answer by ID1263182794. Last edit by ID1263182794. Question popularity: 1 [recommend question]
Answers.com > Wiki Answers > Categories > Animal Life > Pets > Dogs > What is wrong if your dog keeps chattering his jaw?
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Your dog keeps chattering his jawWhat is wrong?
