How much room should there be between the ceiling of the coop and the roost? Our coop will be 42" in the back, 48" in the front (and raised 24"). At what height above the floor should I plan to put the roost to leave the chickens (currently bantams but would like to plan for full size chickens just in case) enough head room. It will be well ventilated, but hopefully not too drafty at the top, as we live in a warm climate.
