So, I have read that the roost needs to be higher than the nest boxes, so they hens won't roost on top of the boxes. Is this also the case if the nest boxes are external? Mine will be open, obviously, to the inside of the coop, but the actual tops of the nest boxes are outside, so do I still need to worry about the height? I only ask because my brother is building the coop for me and he wanted to do 2 rows of nest boxes, one on top of the other- but I think that would make the top row pretty high, and I don't know that I could have the roosts higher. Would it be ok if the roosts were at a similar height to the top row of nest boxes, since there is no top to roost on, or will they "roost" inside or at the front edges of the nest boxes? Also- just a random question to throw in here- do you use 2x4s for roosts wide or skinny-side up? Do you have to round the edges? Thanks so much!!!