I recently put my 7week old chicks (5 of them)in the coop I built. The coop is an "A" frame, 8' long,4' wide at the bottom and 4' tall. The outside is covered in wire except where the hen house is. The hen house is about 16" off the ground, and takes up about half of the length of the coop. My question is what are the possibilities why the chickens won't go in the house?