We are in the process of designing a coop. We need it to be predator proof, as well as warm enough for a canadian winter. We were thinking of putting nesting boxes on the inside wall of the coop so that we can access the eggs from the storage room. We were planning on having the nests were the eggs roll away from the chicken.... any thoughts? Plus, hubby was wondering if we can make the run outside 3-4' high or do they need it to be 6'? We have GLW and SLW. We are planning on making the runs quite big because we live on a farm and we have the room to do that.