My girls have been laying for a few months now. They all stopped for about three weeks when it first turned cold (about month ago). I was getting about four eggs a day, then nothing for those three weeks, and now I get maybe one or two a day. I have 6 barred rock hens that are 8 months old. Is it normal for a hen to lay a 'fart' egg after laying for a few months. I suspect that maybe she hasn't laid an egg since they all stopped a few weeks ago and this is her first attempt at re-laying? Thanks a bunch!