I was thinking about getting a plastic one when my homemade one falls apart - I was looking at the Solway Recycling ones, in particular the Smart Hen House or the Eco Ark. I already have a pig ark by them, and although they aren't cheap, they are well made and very robust and will outlive anything made of wood. I need to see them in person though, so was trying to find out what shows they would be displaying at this year.....