Squirrel Attacks Burglar

Adam Pearl of Meridian, Idaho, came home to find evidence that his home had been burglarized- footprints in the snow, missing items, etc. His pet squirrel Joey was okay, though. As events unfolded, it turns out that Joey had acted as a guard dog, and repeatedly bit the intruder!

(YouTube link)

He should get a "Beware of Squirrel" sign to warn off any future home invaders. Joey is now regarded as a hero.