I have a pen with 4 OEGB's. The roo snd one of the hens aren't quite a year old yet and the other 2 hens I'm not sure how old they are. Any how I'm pretty sure the one I'm getting eggs from is the young hen with maybe one occasionally from one of the older hens. Well a month ago I set some of their eggs and I got 0 development. Is my roo not fertile or is it possible that he's just not old enough? I know it's not from lack of trying. If it matters any they are blue breasted reds. Thanks for any suggestions.