am new to this so am not too sure what to do, i live in UK and it can get cold here at night, would a heat lamp help? i have a normal chicken coop fits about 10 hens i got 10 in there. i am going to be changing this coop and getting a 6x4 shed so i can walk in and have easy access to the coop. what would be the best way to keep them warm. This is my coop.