I have a coop in my insulated garage right now but last winter I had to keep bringing the chickens in the house on extremely cold nights. I am planning to turn my dog kennel in the garage, into a chicken coop. The kennel has a cement floor and is chain link fence to four feet high. I have 3 hens and a rooster so their is not much body heat. I spoke to a vet and she suggested chipboard to 4 feet high to hold the heat in from the heat lamp. So I was going to attach chip board to the fence as she suggested. and continue the fence up to the ceiling. I am concerned though that even with a heat lamp that the heat will just rise. I want to build this right the second time! I don't want to go through another winter worrying if they are warm enough. I have heard of roosters losing their cones due to frost bite and I definetely do not want this to happen in my coop! Any ideas before I get stared???