www.catawbacoops.com - I ordered these plans yesterday, and after looking at some pictures it looks like my dual-purposed chickens (buff Orps and EEs) might be a little cramped in the top part. Do these size chickens fit ok, or would it be a big deal to make it about a foot or maybe two taller and give my chickens a little more space in both the run and the roosting section? I also plan on making it 2' longer, so hopefully I can put a couple more hens in it. Also, if anyone has ever used these, what do you think? Are they predator proof, easy to clean? Are they sturdy? It looks kind of like the side sliding doors could be shaken off by a larger predator, such as a big dog. Do they come off as easily as it looks? I may use hinges there instead... Any other advice or experiences about these coops would be great. Thanks!