The mystery is what triggers it. And of course we know the end results with a dog that dies of it. Dogs are alert, hungry, energetic. Normal feces starts with mucus sheath, continues to get progressively softer until becomes explosive diarrhea. Vomiting may or may not accompany.
Dogs dehydrate at an astounding rate.
The younger or weaker the dog, the worse it is. Some dogs may never get it, even tho they may be kenneled with an afflicted dog. Some dogs also get over this without treatment. Treatment is 250mg Cephalexin per 25lbs of body weight. Pups may get Ceph-drops.