I built a bed for my son last year and discovered before building how BAD plywood is for our health. I'm not a nut job but apparently plywood found in our homes (and coops) continues to off-gas formaldehyde for years. So... if we are really trying to keep happy healthy organic chooks should we be enclosing them in plywood? (painting does not help) Like I said, I'm not a nut job but I'm thinking of using an alternative material for my coop walls and wonder if people have ideas. Home depot sell formaldehyde-free plywood (Columbia forest products make it) and although I used it for my sons bed it is prohibitively expensive.