[Mulletman]

Take the dog, you know you have too, just dont tell anyone about it. Give him a call in a few days and ask him about the dog. When he asks why you're inquiring - tell him because it passes away. Just make sure to save the dogs flee collar or one of its toys in its current condition. Don't wash it, make sure its smell is strong enough to bring tears to ones eyes. If you dont have his number then mail the toy/collar to him with a nice little note. I know this sounds awful, but that is the only way to get him to realize what he did. If he didn't care about the dog it will show.