I have 4 chickens, almost 7 months old. I have one that's a great layer she lays 1 egg a day sometimes 2 on rare occasions, and I'm 100% sure she is the only one laying. I believe they are rhode island reds, (I'm very new to chickens). When bought them I asked for barred rocks and as they aged the got red and I knew I got the wrong kind from the breeder. Yes they are all hens as well. Why are my others not laying? They are out majority of the day, they get lots of fruits and veggies along with their layer pellets, and access to grit and oyster shells all the time. There is 6 nesting boxes in the coop as well. The can't see outside in their coop and nothing can get in (their coop is in a barn) So I know nothing is stalking them. Is there something I'm doing wrong? Or anything I can do to speed up the process?