A guy walks into a bar with a dachshund under his arm. The dog is wearing a Philadelphia Eagles jersey and helmet, and is festooned with Eagles pom-poms.
The bartender says, "Hey! No pets are allowed! You'll have to leave."
The guy begs him, "Look, I'm desperate! We're both big fans, the TV's broken at home, and this is the only place around where we can see the game."
After securing a promise that the dog will behave, and warning him that he and the dog will be thrown out if there's any trouble, the bartender relents and allows them to stay in the bar and watch the game.
The big game begins with Philadelphia receiving the kickoff. They march down field, get stopped at the 30, and kick a field goal. Suddenly, the dog jumps up on the bar and begins walking up and down the bar giving high-fives to everyone.
The bartender says, "Wow, that's the most amazing thing I've ever seen! What does the dog do if they win a game?"
The owner replies, "I don't know, I've only had him for three years."