I've searched google and the BYC forums and have been unable to find the answer I'm looking for - hoping someone can help me out. I'm about to finish my duck coop and I need to know how big to make the pop door. Does it really matter how big the door is? The coop is built from pallets and I was thinking of making it half the size of a pallet (picture it laying horizontally on its side) and fairly wide. Would this work?