Dogs in Bar

Man with a German Shepherd dog goes into a bar and sits down at the counter. Bartender says "You can't bring that dog in here!" Man says "But this is a Seeing Eye dog!" Bartender says "Well, OK, then I guess it can stay."

After a while, the man and the German Shepherd get up to leave. As they're going out the door, another man with a Chihuahua is coming in. First man says "The bartender won't like you bringing that dog in here, but just tell him it's a Seeing Eye dog and then it'll be OK." Second man looks dubiously at his tiny Chihuahua, thinks a few seconds, thanks the first man and goes on in.

Bartender says "Hey! You can't bring that Chihuahua in here!" Man stares straight ahead and exclaims "What! They sold me a Chihuahua?!"