Dog Can Smell When 3-Year-Old’s Blood Sugar Is Too Low [VIDEO]Dog Can Smell When 3-Year-Old’s Blood Sugar Is Too Low [VIDEO]Ruby isn’t one of those dogs that can just roll over or fetch — this four-legged doctor can actually detect when his owner’s blood sugar is too high or too low.
![Dog Can Smell When 3-Year-Old’s Blood Sugar Is Too Low [VIDEO]](http://townsquare.media/site/101/files/2011/10/rubydog.jpg?w=980&q=75)
