Dogs are really gross sometimes. They like to drink right out of the toilet. I bet that while you're in there taking a crap he's looking at you and saying to himself, "Now why is he taking a crap in my drinking dish? Couldn't he have gone in that box the cat uses, it's up the hall there and much easier to get to?"
"And he sent ME to obedience school? What kind of shit is going down here?"