Wilson the Water Buffalo stacks barrels for fun. I usually can't catch him at it when have a camera with me, or when I do, he stops and stares at me. He stacks the blue barrels on the bottom, and the green barrels on top, all upside down.
He picks them up by balancing the lip of the barrel against the tip of his horns and maneuvers them to the top of the stack. If he doesn't like how it looks, he pulls it back down and starts again. He has been stacking barrels since he was about a year old.
He has a total of 6 blue barrels and 6 green ones that are normally scattered all over the pasture, periodically, he gathers them all up, and puts them neatly in the corner!
