Is that a problem? we have 6 chicks that are 9 weeks old & they sleep in the run/coop with a heat lamp still... is it a problem to have them hanging out & pooping in the nest boxes... there is no bedding in there yet... should there be? also... on a somewhat related matter, one of the gals' poo is very dark & runny [sorry for the visual] is that cool? do they prefer to sleep in the dark? are they old enough to sleep without heat?