Switch roosts from round to flat. That's what I did. That way, they SIT on their feet, and toes aren't exposed to the cold. I use 2x6's, but most people just use 2x4's.Picture me slinking around a corner....all chickens were fine this morning except one. The lone silkie hatchling that is now 6 weeks old and no bigger than your hand. I had put him in with 3 mille fleur bearded duccles that are 12 weeks old- all put into the newly finished cage/coop in the feed shed so that they are more protected. Dang nut (and I say this in a sweet nice way because he ended up being a $40 bird when no one else hatched) is the stupidest (if that's a word) chicken I have ever owned! He has no sense of balance and I had to curl his toes around the roost a few nights ago before he stayed put. This morning he was making the most awful noise and the millies were looking like they didn't know what was going on with him. His feet were frozen solid!!! Carefully brought the squirt in the house and slowly warmed his feet with body heat and a cloth. He is so loving and as much as dh may not like it Con may be in the house until it warms up. I know his feet must be throbbing and feeling funny, he isn't back up on them yet. I hope there's no permanent damage- no ice was on them or anything. He just seems to have no chicken sense!