Jack, a dalmatian, waits for his masters to come home. Suddenly, he begins to feel strange. He finds himself wanting to stand on his hind legs. When he does, he finds that it is more comfortable. Then he looks down on his back paws to see them developing heels and becoming more like human feet. Then he looks at his front paws and sees them stretch into hands, complete with fingers and opposable thumbs. It continues down his front legs as they became arms. When it was done, he had become an anthro version of himself. He still had a canine head, fur, claws, paw (or hand) pads, and tail. Jack wonders if any of the other dogs have changed. So he went outside to check on the next door neighbor's cocker spaniel, Maria.