It's wrong to abuse animals that you've adopted.
Kenny has brought hope a puppy from the animal shelter and is house training it when the puppy pees on the floor.
Kenny wants to show the puppy that it's wrong to pee on the floor.
Kenny points to the pool of pee on the floor and tells the puppy no, repeatedly.
Kenny slaps the puppy on the back of the head in an attempt to have it associate peeing with pain.
The  puppy begins to understand that Kenny is unhappy about the puddle of pee and that it should stop peeing inside.
The puppy begins to hate Kenny and is terrified of him and traumatized by him.