One day, a man takes his Rottweiler to the vet.
“What seems to be the problem today?” the vet asks.
“My dog’s cross-eyed. I was wondering if there’s anything you can do for him?”
“Well,” says the vet, “let’s just have a look at him and see what we can do.”
So he picks the dog up and examines his eyes, then checks his teeth. Finally, he tells the man, “I’m afraid I’m going to have to put him down.”
“What? Just because he’s cross-eyed?”
“No, because he’s really heavy”