A dog walks into a bar and says, "A scotch on the rocks, please." The dog hands the bartender a $10 bill.
The bartender thinks to himself, "This dog doesn't know the prices of drinks," and gives him 15 cents change.
The bartender says, "You know, we don't get too many dogs in here."
The dog replies, "Well, at $9.85 a drink, I ain't coming back, either."
:-)