Funny Joke

once a man walked into a bar with his dog. The bartender freaks out and says "you can't bring that mutt in here! It'll make a mess" so the man says "ok i'll make you a deal : if the dog can talk can he stay ?" the barttender starts to laugh "sure, deal." so the man points up and says "what's that ?" the dog replied "rrooff" well done says the man. he walks to a small tree growing by the window and peels something off it "what's this ?" "bark!" says the dog "that doesn't count !" says the barman "he spoke didn't he ?" so the bartender stamps away then the dog said "i wonder what's his problem