We're trying to get our coop together and have a few questions. 1. Can we use cedar posts to hold the fencing on the run portion of the coop, or is that a no-no? 2. How high off the ground do the nesting boxes need to be? (we have a welsummer, easter eggers, a wyandotte, and an australorp) We're converting a Rubbermaid shed (7'x3.5'x6'h) and attaching the run to the side so the girls can get there through a pop hole. Thanks for any help!!