Our girls are about three weeks old. DH is constructing their "permanent" run (ie - not the tractor) this week. We have a 12'x6'x'6 chain link dog kennel that they will be going in, with a chain-link top. Would you reinforce the chain link with another material like chicken wire or hardware cloth? How far up the sides would you go? For the ground around the coop, do we need to use hardware cloth or is chicken wire sufficient? thanks!