My daughter and I built this coop for her Coturnix quail from an entertainment center someone put out for trash pickup down the street (columns), and an old door (roof). It's on wheels so it can be moved around easily. We wanted to save money on hinges and door hardware, so we came up with the sliding front panel idea. All we had to buy was an 8' piece of aluminum U-channel ($8). It works great because you can open it as narrow or as wide as you want, and the opening can be on the left or right side of the coop for good access to all of it, or even slid off completely for a major cleaning. We have built a second coop under the first since I took the photos. I am using full sheet restaurant pans for droppings (2 side by side that slide under the coop). I can add more photos of that if anybody wants to see that. They are aluminum (no rust) and very sturdy and run about $8 each. We fill them with "dry stall" which really keeps the odor down. The white paint is still primer, we're planning on painting it to match their playhouse in the background. This is my first post, so I hope I put it in the right section!