I am an elementary school teacher with some backyard chickens. I have a greenhouse that keeps ripping open and never gets used. I am planning to convert it into a chicken coop. This is what it looks like (sort of, except it ripped to pieces in a storm): This is what I plan to put inside (I have two of these): So, in a nutshell, I will cover the greenhouse frame, which is mostly wood and some PVC pipe) with chicken wire and put the barn inside (can be a brooder barn, place to roost and lay.) I then want to put a fence off to the left so classes can come in and help with cleaning, feeding, etc. Questions: The greenhouse has gravel on the bottom. I plan to leave the gravel, which can be raked. I will put pine shavings in the barn and lock 'em up at night in the barn. Any problems with gravel? The yard is grass, but won't be for long when we and the chicks start trampling on it. I planned to throw down a lot of hay and then rake it out and compost it from time to time. Sound feasible? If the yard is about 10 by 20, how much hay is that? I was also thinking of building a wood lip around the coop/yard to contain mess, with 1 by 4s??? I want to try to keep it reasonable tidy, or the powers that be won't be happy. Any other suggestions??? Ideas??? Thanks!