Not sure if anyone else is doing this, but I've started using the XL (35 lb or 17 lb lite) Tidy Cat buckets for nest boxes. I wanted something that had a hinged lid that I could set up to collect eggs from OUTSIDE my chicken tractor. The hinged lid is perfect. I drilled a couple of holes near the top of the lid and worked the hook on a bungee cord through, then pliered the hook closed so it couldn't come loose. The lid snaps closed and the bungee is insurance in case one of my girls pushes too hard on the back of her nest box. I used a jig saw to cut out the bottom as you would for a 5 gal nest box (just make sure you have the same top and bottom on both ends of the bucket before you start to cut - lol) and put a length of soaker hose over the cut bottom edge, drilled a series of holes under the hose edge and threaded a thin wire round and round the hose to keep it in place. I think soaker hose is easier on their feet. At the same time I fixed up a 5 gal bucket in similar fashion and put two TC buckets and one 5 gal bucket up for my new layers. No on ever used the 5 gal, but they fought over the TC buckets so I gave in and made up one more. This was great for me, the 5 gal bucket lid was hard to get on and off and the TC is so easy. I was afraid the TC buckets might be too small (they are only 10 in wide x 12 in tall). I have a barred rock, RIRs and EEs. They all fit, can turn around and seem to like the flat bottom. With the handy hinged lid, it's easy to collect eggs and to clean out the shaving if they get too dirty. Since I moved the cat litter from the TC bucket to a spare 5 gal, I know that the TC holds exactly as much as the 5 gal. so if your girls will use a 5 gal they might actually like the TC bucket better. Thanks to everyone for all the great posts. It's been wonderful to take one idea from one post and another from someone else to make a tractor run and a Rubbermaid coop that work perfectly for me. I'm so glad I didn't have to learn everything the hard way. Hope this helps someone else. .