Dogs are the greatest. Besides being our best friends, they also have cool jobs in fields like law enforcement and environmental conservation. But their noses are good for more than just detecting contraband or explosives; they can help us with our own medical issues, too.

Hypo dogs are canines who can sniff out changes in people’s blood at a molecular level. They are being used in the medical world to alert diabetes patients when they’re about to have a hypoglycemic attack, before symptoms even arise. Watch the video above to see some of the amazing stuff our furry friends are capable of doing.

Banner image via Getty.