Dogs can sense when a diabetic’s blood sugar level drops​

Equipped with an acute sense of smell, some dogs sense when a diabetic’s blood sugar level drops. Diabetes Alert Dogs are trained to recognize hypoglycemic episodes and alert their owner – most likely reacting to scents produced by chemical changes triggered by the glucose imbalance.

A dog's sense of smell is 1,000 to 10,000 times more powerful than humans. Their noses are lined with as many as 300 million olfactory receptors and the bit of their brain that processes scent is (proportionally) 40 times bigger.