When we first moved our flock of 5 into the coop, they would all huddle in a pile in one of the 3 nest boxes. I read that that was a really bad habit for them to develop, so we blocked off the nest boxes about 2 weeks later. Our flock will be 12 weeks old tomorrow, and they have been dutifully using their roosting bar every night for about a month and a half now, without fail. We still have the nest boxes blocked, so I was wondering at what point we should/could open them. I know it'll be a good while yet before anyone even thinks of laying an egg...maybe longer since we'll be into the end of autumn/early winter before they're even old enough, but I've read a lot of threads where people's chickens seem to like to "practice" visits to the nest boxes and check things out before they get around to laying (apparently sometimes well in advance). So should I open the boxes now or wait awhile longer?