I have 4 2 year old girls. They were laying just fine for a while. I took my 8 week old girls out to the coop to get them use to each other. It has been about a week since this happened. Now only 2 of them are laying and I was wondering if this is due to them being mixed together? There is a way for them to be in separate areas and if they want to be with each other they can. Any one have any thoughts about this?