my 5 wk old babies live in the coop. they still get the heat lamp at night. on days like today when i don't get to the coop to tuck them in until after dark, they are all hundled in a pile. as soon as i turn on the dim lights they relax & spread out some. do they get used to the dark when they get older? i'm thinking i need to set up a night light for them when they don't need the heat lamp anymore.