I know I should slant the roof to preventing poo and roosting. I know I need a 'lip' to keep in shavings. I know I need a little roost along the front so they can get up and I know the nest boxes need to be lower then the lowest roost. So if my lowest roost is 14" off the ground then can I have the nest boxes almost flush with the floor of the coop to make them lower than said roost? Will the girls use them if they are that low?