Another old image from around the late 90's. This was a character made for greeting cards. I don't remember the exact words for the cards -- but the cover had a phrase that had the dog saying how excited and elated he was that it was "your birthday!"
The caption inside the card read, "But then again -- I also like to sniff butts, eat my own vomit and drink out of toilet bowls."
ADDENDUM: This is for some reason one of my blog's most popular characters. This image gets hits throughout the year from all over the world. Anyway, I found a B&W inked version of this character, thought I'd paste it here. Not sure if I have the pencil sketch, but if i find it, I'll add it here too.