I had a chick that would pull on the toes of other chicks. Not peck, pull, and pull so hard he'd tip the other chicks off their feet. He'd go one to another, like on a mission. I would sit there for half an hour watching him, tapping his back when he'd do it, and I could tell when he was going to do it so tapped him before he did it. I'd leave for a couple hours and come back to two chicks with bleeding toes, so that wasn't working. Hubby finished building the new brooder and it wasn't that the old one was too small, but this one was double the size. That did it! Thanks for the ideas. That was about 6 months ago and I forgot to rate your article that helped me.