We are just starting to build our Coop, which will be inside our barn in an old stall. The 'run' we are building just outside the barn {which they will be able to get to through what we call a "chicken bridge"} will have a large old pine tree in it. We thought since that side of the barn can get alot of sun & heat, that perhaps building the 'run' around the tree would be a good idea for shade. Now...are their any negatives to having a tree inside the 'run'?? Are the pine needles harmful to the hens?