I have been working on a chicken tractor for a while now, and I am finally getting close to finishing it. I do need a little help with nest boxes though. I'm planning to build then off the back of my tractor. Each box will be a one-foot cube with peg board used as a divider. Is this size big enough for buff orpingtons, rhode island/newhampshire reds, russian orloffs, dominiques, or barred plymoth rocks? I've haven't started on them yet, so there is plenty of time to modify the design. Sorry I have no pictures. One last question would be what type of plywood is best: thin 1/4in. exterior or the thicker 3/4 what I'd call "standard" sheet?