We are outfitting a storage shed for our girls and I have made some nest boxes and am wondering how high off the ground should they be? I know they should be lower than the roosts but after that I don't know. I have lots of head room in the storage shed, so that isn't an issue. Do you have ladders leading up to the nest boxes or should they be high enough that the girls can just fly up there? Any suggestions would be greatly appreciated!