From Wally
What does the barking dog do when he catches the car?
Wally –
He shuts his yapper.
Side note: And this is sad, back in the old days, when a racing greyhound at the dog track caught the metal bunny (“Here coooooomes Whisbone and they’re off!” was the call at Victoryland between Auburn and Montgomery) they had to put the dog down because he would not run after it any more.