I have 7 girls that I received around March 27. They are out growing their brooder now. All but one have feathered out. I'm worried cause the weather is around 60 with dropping down to the 40's at nite. I also have 5 girls about a year old in the main coop which a small . I'm not sure how they will take to the new ones. I'm also in the process of building a very large coop, but it won't be finished for a couple of weeks. Any suggestions?