Let’s say that the pee is frozen. Then you could make it a shape of the dog, and put said animal inside of it. You could make the metaphysical argument, that when the dog has an outer layer of pee, it becomes a pee dog. If you take a weapon (for instance a Fiskars branded chef’s kinfe) and stab the pee-dog in the chest 67 times, (again, assuming that having an outer layer of pee makes something a pee-object) you would have successfully killed a pee-dog, making your argument invalid