I'm in the process of actually designing my own coop. There's so many great tips and tricks to keeping a clean coop here, I couldn't just get some prefab thing. So far it's looking to be about 5ft deep by 6ft wide, and on either side is a row of raised nest boxes. on top of each row is a poo tray and roost. Can't decide if i'm gunna go with lenolium or tile yet. Probably tile because it's easy to find free on craig's list as remodel left overs. Couple questions for the long timers: How high can a full size be expected to hop to get to a roost or into a nest box? Also, any plants that chickens will eat if given half a chance that are very very not good for them?