I will begin construction of my roosts tomorrow, and I was wondering how wide do I need to make my poop boards? Also, do you 'center' them under the roost or offset it to the front or back some? I initially thought that I should center them under the roost since you don't know what 'direction' the chickens will sit. So, with that in mind, how wide should the board be? I have RIR's and Buff O's. Is 18" wide enough? I've never had a chickens before so have no experience in this area.