On predator issue, I forgot to say that chicken wire is no good against coons, dogs, coyotes, badgers, groundhogs, etc. Welded wire and chain link has holes too big and coons will reach thru and decapitate your chooks. Hardware cloth mesh is best.
Low wattage heat lamps, like say 75 W each placed overhead securely where they cannot be knocked down into litter to cause fire. Reflectors a must. Secure mounting a must. If overhead, need to be no less than 18" above roost pole. If cannot do that due to size restrictions, place one each in...