[header] How to know when your dog is sick [title] Watch for excessive drooling or bad breath. [step] Excessive drooling or bad breath can be signs that your dog might need some teeth extracted. In order to prevent many dental problems, try to train your dog so that he allows you to brush his teeth. 
Look for the following symptoms in your dog that might indicate a dental problem : [substeps] Watch to see if your dog is eating less. Notice if your dog is sensitive to you touching his muzzle.