Dogs can be weird. Any dog owner will tell you that, but typically their shenanigans are just personality quirks. Unfortunately for Colleen Ferguson of Kent, England, her dog’s weird behavior wasn’t just a silly personality thing.

For several weeks, Ferguson’s German Shepherd was obsessively sniffing her mouth. This was a new behavior that she found quite odd. The dog, Inca, was only two years old, but she seemed to know something was wrong with her owner and was doing her best to let her know. Inca constantly sniffed around Ferguson’s mouth and frowned.

How Inca knew something was wrong

The dog’s persistence caused the then 60-year-old woman to become concerned, which led her to the dentist. Everything checked out fine, but Inca was still frowning after sniffing Ferguson’s mouth. This prompted Ferguson to visit her doctor to be tested for other things that might change the smell of her breath.

According to Medical News Today, diabetes can cause the breath to smell differently. Gluten intolerance and Celiac disease can also cause bad breath, according to........

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