the dog is astounded by your reasoning
With that, the dog immediately teleports himself beck to your world
and leaves you stuck in this one. That's what you get for helping
stupid dogs like that. He'll probably bite someone in your world and
infect them with his stupidity. Not that that would actually matter
much, stupidity is a disease that spreads far more easily and more
rapidly than cancer, and it has already crippled the majority of the
human population. The dog won't be able to do much to add to
it.
"My good man," says the dog, "I do believe you are
right. I've never thought about it that way before. Your reasoning
ability is extraordinary indeed."
