Sometimes, dogs do strange things. Beyond rolling in mud puddles or biting themselves, your pet might drink from toilets or lick its butt. In other cases, it may eat its own poop or, worse, the poop ...

Dog Gone Problems is a weekly advice column by David Codr, a dog behaviorist in Omaha. David answers dog behavior questions sent in by our readers. You can reach him at [email protected].

It might not seem like it to us, but it's actually normal canine behaviour. Here are some possible reasons behind it ...