I had my 8 week old Leghorns pullets sleeping nicely on the Roost. The only change that has happened is the removal of light at night. It's in the upper 50s at night now. They are now all trying to sleep in one of the nesting boxes. Are they cold or just scared of the dark?The obvious answer is put the light back but is that the right answer? Would a red light be ok and should I be worried about their days and nights getting messed up?