I trying to figure out how I plan on building my coop, and think I'm going to do it with pallets. The coop will be under my sun room, on the porch, so I can use the existing walls and the railing as well. When I stack the pallets up on the two open sides, I have about a 14-18" gap around the top of the coop. To make it more aesthetically pleasing on the outside, I plan on using my left over siding that was put on my house. My question is, could I just mesh over the gap on the top and use that as a source of ventilation? Have checked out quiet a few designs on here, but haven't seen this done yet, for whatever reason. I will make it to where I can close it up in the winter months, but while it's nice out I was thinking it would be an option. Any ideas?