Chad looked at the label on the can, "Wait, this says "The Finest Flea Spray For Your Dog", I am sure it said "Body Spray" before. Todd, did you switch cans?"
"Dude, I just got here after you sprayed that stinky stuff on you," Todd replied, then he noticed something different about Chad. He said, "I always thought you were a natural blond, but obviously, you must bleach because you missed all those black hairs on your back and butt."
"Hairs on my back? Black hairs?"
Chad spun around, and Todd could see that his formerly smooth chest was now covered with a thick black pelt. Chad kept spinning around trying to see the hairs on his butt. Just like a dog, thought Todd, and that's when he noticed that there was a stubby dog tail growing out of Chad's spine, and it was getting longer. He had to get a better look. Todd reached out to Chad, and said, "Heel, boy! Heel!"
Chad squatted on his bare ass with his hairy forearms between his even hairier legs. Chad was vaguely aware that he wasn't behaving correctly, but he wanted to please Todd. He really admired Todd, he felt that he owned Todd and Todd owned him.
Todd tousled the hair on Chad's head. He could see Chad's nose and jaw were pushing forward to form a muzzle. Chad's ears had grown and started to hang over his ear holes, and were migrating up the side of his head. He cradled Chad's head, and realized that he was become a black Labrador Retriever. He reached down to touch Chad's shoulder, and realized as Chad was getting hairier he was shrinking. As a human he probably weighed 185 lbs, but as a dog, Chad couldn't be more than 100 lbs and was still shrinking.
"Good, Chad," Todd said rubbing the furry dog boy, who was rapidly becoming more dog and less boy with every passing second.
Chad beamed, even as he teeth grew less square and more pointy. His tail wagged happily. He was a good Chad.
Todd patted Chad all over feeling his doggy musculature. Todd knew something about dogs, he's dad owned a kennel. Chad was one fine dog. A real stud, he thought with a snicker. He didn't notice that as he inspected Chad, Todd's own crotch ended up on top of Chad's snout. Chad inhaled deeply the scent of his master. Smells were creating images in Chad's new canine brain, as his vision shifted from multicolor to monochrome. He could hear Todd's heart beating, and the sound of other people coming toward them.