I'm in the process of converting a raised (40") playhouse into my hen house. The pop door will be in the floor, which I know is less than ideal, but for several reasons, it has to be. The playhouse is 4' x 6', and only 2 hens will live in it, so I'm not worried about losing floor space. Couldn't the ramp go only about 1/2 way down, then attach to a box - maybe a wooden crate? From what I've read, most chickens don't actually use the bottom of the ramp anyway, they hop up or down. Do any of you have this type of set-up? Would you mind sharing pictures?