I raised mine on 1/2" hardware cloth, sort of. Most of the poop falls through but not all. I never had any problems with their feet getting stuck, but I did have one that was about a week old get its "knee" stuck in the wire and had to be helped loose. I'm hoping I never have to brood chicks again but if I do, I'd raise them on wire, sort of, again.
I say sort of because they were not 100% on wire. It is important for them to have access to some of their day or two old poop to eat. It helps them develop immunities. I left the poop on the 2x4's that were supporting the wire and put a piece of cardboard on a portion of the floor so they could get the poop they needed.