dh had to collect eggs after dark the other day and there was a chicken in one of the nest boxes. It was dark so he couldn't tell which one it was. So that explains why there's been so much poop in the nest boxes (and almost always at the very end of it which supports a roosting chicken in there). Any advice? Their roost is at least 2 feet higher than the boxes are-the nest boxes are at floor level and the roost is about 32" up. The roost is plenty long enough for all of the chickens-in fact they rarely take up more than 2/3 or so of it. They can all get up there easily enough. I thought I read about making a curtain of some kind but we already have a couple that sometimes lay in the coop or run so I'm worried about making the boxes less accessible. Or would that even be an issue? eta: if it matters, our hens are about 1.5 yrs old.