Hi Ian Just a comment on bark chippings, I read they were really good in the base of the house, as they stay open and let everything wash down through. In my case this was simply not the case, they just ended up like mash. in a very short period. I meshed the floor in my run so chippings were to prevent sore feet on the wire. Hopeless it was. anyway another piece of hopeless info but certainly worth considering.
Craig