I have five chickens that are 27 weeks old - I have had them since they were three weeks old. One RIR, one BO, two BR's and one Cochin. The Buff has been laying eggs for just a little over a month. I thought one of the BR's had laid an egg as well - but I am inclined to think that only the BO has laid now since that appeared to be a one time thing - it was in a different location so I assumed it wasn't the Buff. The RIR was sick but have nursed her back to health so I can understand why she may not lay but with them being the same age why wouldn't the other girls lay. We have a few cold days but most of our days are shirt sleeve weather. Every so often we have a really cold day and tonight will be extremely cold - but other than that most days are mild. They all have nice healthy looking combs and are a good size. They seem to be happy and healthy - what would make one lay so much ahead of the others. There has only been two days in over a month that the BO has not laid an egg a day and when she missed a day the next day we got a jumbo egg that wouldn't fit in the carton and allow it to close - double yolks. None of them have gone through a molt - it's not like we need the eggs. We eat very few eggs, but I do so love getting that egg out of the nest each day. I'd love to get more than one. If they haven't laid by now will it most likely be spring before the other girls lay?