After researching, my husband got sand to lay on floor of the chicken run. We got it all ready while the chickens were romping in the yard before bedtime. When it came time to go inside, they were afraid to walk on the sand. They would not go in at first, then when they did, kept smashing themselves against the hardware cloth trying to walk on the wood frame to avoid stepping in the sand. We finally got them into the coop but felt terrible. I checked this morning and they went into the run and got on the roost which they can do by a ramp and a old wooden saw horse. Has anyone else experienced such a problem and how did you resolve it.