Bad Dog believes he has to beat some sense into his best friend.

The problems of the bad dog are obvious, much described.

Here's our list of the best and worst hot dogs.

According to some people he is "the world's worst dog" in the movie.

Everyone wept and said he hadn't been such a bad dog after all.

Or maybe they're scared of him, think he's a bad dog.

But even bad dogs have their uses, if they are vicious enough.

Is a bad hot dog an act of God?

You are a very bad dog, but I love you.

How to win at Westminster, where there really are no bad dogs?