When my chicks were new, I fed them chick starter out of a trough feeder. they would climb all over it. I put a dowell in their brooder at the same height as the top of the feeder at one end to just above the bottom of the brooder on the other end. A couple of chicks started getting on the dowell and before I knew it they were all jumping on and off it. As they grew I replaced the dowell with a broom handle and raised it.
