Hi all. I have 5 pullets, 3 at 23 weeks, 2 at 16 weeks. So far only one of the older girls is laying. Right now I have only one nest box and I plan to add another in their secure run in the spring. Their indoor coop space is small so I don't want to use up more than necessary (they have an enclosed run, an outdoor run and they free range a lot). Will they share one nest box or will it cause problems?