I've been looking into building an outdoor habitat for ducks. I currently don't own any, but I am just getting ideas for the future. I found someone who builds chicken coops on Craigslist. They really have some nice products. I saw on their website that they can build custom animal enclosures. They list some sizes of chicken coops, but I haven't raised ducks so I'm not sure how much room they would need. The can do: 4x4 4x8 4x12 If I did this, I would also get them an enclosed pen, so they could enjoy the outdoors too. They list this as 8x8. I haven't decided on breed yet, but we could be talking as big as a Pekin. I may just use their's as a reference and build my own as the enclosure I'm picturing could be over $1,000. Any ideas on size?