After decades of training service dogs, you'd think I'd have it all figured out by now. But recently, a five-month-old puppy reminded me of something fundamental.

What truly sets service dogs apart is the intensive, specialized training that transforms them into life-changing partners.

This is a story about one dog who sparked an idea and another whose expert sniffing led to a medical breakthrough that today helps thousands of people worldwide.

Skilled medical-alert service dogs can make a profound difference in the lives of people with diabetes - sometimes the difference between life or death.