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Remember the old commercial for Milk Bone dog treats that had the creepy, echo-y voice that said “Bad breath in dogs…”? Well, it’s not just your dog that sometimes has really bad breath.

Bad breath in dog’s best friend can have many different sources, and they don’t all originate in your mouth. Here’s a little quiz that may help you to know whether your (or someone else’s) bad breath is not just a dental problem.