Is it normal for baby chicks to sleep for 3 hours in a row? 3 of them woke up to eat and poo but I havent seen the other 2 come out from under the MHP.
I would check on them, but they might. It looks like you could raise that a little bit in the front. The opening doesn't look very wide either, I would be worried the ones in the back could get trapped in there. Maybe it's just the way it looks though.