My 16 BO are not quite 8 wks. They free range all day (will need to stop this as they have found the neighbors yard too exciting) and spend their nights in my lovely coop. My question is whether they need a light at night, and if it should be a heat lamp. How would I know if they are cold at night? Whether now is fine (SW Ohio fall temps), but winter will be coming. They seem to need a light at night, otherwise they sleep under a bush/tree and I have to round them all up (so they don't become coyote food). Wish they could talk!