I have six hens, five of whom are laying with great regularity. They are all 10 months old. They started laying at all different times and some took their time getting started. I have 4 different breeds. The one that isn't laying is the same breed as one who is laying (black manorca, I think - that's a long story). Can't figure out why she isn't laying yet. Since we have different breeds we have different colored eggs, so I can tell who is laying and who isn't. Any thoughts as to why she's not producing?