I have a BCM hen that is quite broody. I really want to give her some eggs to hatch, but want to somehow separate her from the rest of the girls. And I don't want to completely remove her from the coop to help alleviate the rejoining issues. There is not enough room in the coop to put a separate cage, but there are more nest boxes than they need. The nest boxes are the type that are right next to each other and accessible from the outside. It is really one long box with dividers in it, so if I remove 2 of the dividers and make an area that is the size of 3 laying boxes, is that enough room for her to stay in for 3+ weeks? I could wall it off with hardware cloth so the hens would still be able to see and interact with each other.
This is a picture of the coop when we bought it, before we cleaned and painted it, but you can see what I am talking about. Those are the nest boxes in front - she would have half of it.

This is a picture of the coop when we bought it, before we cleaned and painted it, but you can see what I am talking about. Those are the nest boxes in front - she would have half of it.