One of my rats, Pierat, has three brothers. He's smarter than any of the others, and I think he gets bored by them.
One day, to amuse himself, I found him throwing SPITWADS at his brothers! He would take a bit of bedding (Carefresh), chew it a bit, rear back, and go "POO!" The wadded-up bedding would fly across the cage and hit one of the other rats on the noggin. That rat would jump up and look around as if saying, "Huh...what? Where come from?" Then he'd settle back down, and Pierat would do it to another rat. The delinquent!
