I originally drew Poop Dog four or five years ago. I have absolutely no idea where it came from, but I do remember thinking it was funny at the time. In fact, I still get a chuckle out of it.

For the comic, he's been updated a bit. You can find the original Poop Dog on some merchandise in the store. As of this writing, I've sold exactly one t-shirt from there, and Poop Dog was on it.