My new girls this year got their own new coop and the older 2 hens had theirs. They went into their respective homes regularly until about a month ago. Now some of the new ones have moved into the older coop. Now I've got 7 in the newer, larger and nicer coop and 6 in the smaller, older one. Any idea why they change their sleeping quarters? Comically, one of the ISA browns, who was first to move, now rushes over to her old house in the morning to lay. She tries to get in while the others are coming out. You'd think she'd either change laying spot or sleeping spot to make life easier. Any ideas?