I have had two bantam hens for a couple months now. One is about 6 months and the other just over a year. Neither is laying. They also never want to leave the "house" part of their coop and I have to lock them out every morning or they will stay in there all day. They get layena 16% layer pellets and I move the tractor to new grass to forage about every 2 weeks. Any suggestions or ideas of what I'm doing wrong?