I bought the medium Best Nest Box, which is supposed to be sufficient for up to 20 hens. I have 12, so that is the size I bought. It is a "community" nest box - supposedly to accommodate more than 1 hen laying at a time. The box looks small to me, and I have never seen more than 1 hen in it at a time. I have some big girls (buff orp.) and not sure 2 would even FIT in the box! LOL Hens have only been laying about 6 weeks, but at least 2 birds are laying on the coop floor. I have 2 fake eggs in it and tied up the curtain until they got used to the box, and have now lowered the curtain & it's still being used. EXCEPT for the 2 laying on the floor. I don't know how to figure out which 2 are laying on the floor... How can I encourage using the nest box? And do you think the medium box is really big enough for 12 hens? I don't mind buying a second one, as I *LOVE* the rollout design. But eggs on the floor get broken & eaten and I don't want *THAT* to get started!!