Here's one that I always find interesting to this day. Never underestimate chickens. They have a brain when they want to. So my chickens used to like to go in the hog pen and scratch around for feed. I was not pleased by this, and they knew it. However when I let them out they would run straight for it. Well one day I let them out and was heading back over to the house. They made a beeline for the hog pen, then before they got to the hole to get in they started meandering along. I was like surely they aren't that smart. Sure enough, when they thought I was far enough away and had turned my back, they ran as fast as their little legs could carry them straight into the hog pen. HOWEVER, when they want to be dumb...you can't budge 'em.