Our chickens seem to hate roosting. Especially the younger ones. And when they do, it's on the perch that's attached to the front of the nesting box. It's not because there isn't enough space. And the nesting boxes are significantly lower than the perches. It's very annoying because there is always poop in the nesting boxes in the morning. Which gets on the eggs of course... If I go in there after dark and turn on the light, a huge amount of them fly down from the roosts and act like it's day time.