Oh, they'll go to the "right house" but they'll decide where that is and if they all decide it's one house, then one house it'll be LOL. When I got the big girls their house, most of them were sleeping on the verandah. I think they go inside now, but to start with, they weren't even going...
The only thing that springs to mind is that you'll have 2 coops to clean (assuming your girls use both). You might find that everybody scrunches up together in just one of them.
I have 2 coops, but they are separate. When I got my "little girls" the "big girls" were mean to them so I kept...