this brief thought crossed my mind today as I watched one my 6 week old chicks alight on a hay bale and gleefully began shredding and scratching my hay! There is another hay bale on top of that and the roof is about another 4 feet up. The roof is vented with an overhang, just enough space for a small critter to fly the coop and slip out accidently. Think they can fly out?
Give them time. They will explore eventually find it. I hope the chicks are not sleeping there at night. If it is large enough for a bird to get out, predators can get in...