To see who shot his "paw."
With a blue elephant gun. You hold his trunk until he turns blue, then you shoot him with the blue elephant gun Edit: My 5 year old nephew loves this joke.
Cause when he asked her why she shot it, she replied: "I asked it what it was before I shot. But that cow wasn't gonna fool me!"
Those who understand binary, those who don't, and those who weren't expecting a base 3 joke.
Santa stops after 3 Ho's
I'm paw!
A PAW-se