So. . .have been inspired to get chickens based on the old coop in our backyard. It is an old-timer design. Dirt floor. Door that doesn't securley close (and is made out of two by fours and chicken wire). Some old boards somewhat bowed out. . .Ventilation at the top provided by chicken wire screening. Don't even get me started on the actual run, although I am counting on my dogs to keep the predators away during the day when the chickens are out. . .Question is, can a chicken house like this be updated and made safe? What would we need to do about the dirt floors? Is the design of having chicken wire ventilation between the roof and the boards going to keep our brood safe? How to I make a tight door for an already made door way? Any ideas or experience?