Sissy Cobb News Today

Body are creating some kind of a scent that the dogs are detecting. >> reporter: and dogs have other superpowers, too. some have a nose for blood sugar. they help diabetics. others can predict seizures. watch as this dog pins down 16-year-old sissy cobb, an epileptic. >> the dog is telling you dont get up. >> reporter: shannon still passes out, but clover warns her every time. >> shes a gift from god that, i mean, science cant explain this. >> reporter: a new kind of superdog with an instinct to...