hello,ive got 2 1 yr. olds and 2 6 mos. old seramas in a 4x6 coop with 2 inches of insulation.(my dh made it out of garage door sections)its going to be 32 here tonight and its their first winter outside.heat lamp or not???i am planning on ordering 1 of those ambient heaters but havent yet. your opinions are very much appreciated..thanks.