Thanks I look at that later when kids not around

Grid stuff is just plastic grid mesh you would get on a roll at the garden centre. We were left lots of it here in the polytunnel and so have put it down outside the goats house and on frequently used routes, it does help reduce the feet clogging thing quite a lot but you have to lift it every week or so, shake it out, put it down again but that's hardly a hassle really. You get different gauges so the closer gauge works better than the wider type. If you don't have any its worth buying some as it's working quite well, but think it may be a bit pricey. We only have pygmy goats so perhaps they're lighter footed walking on it, should think it would be useless with piggies but they'd probably eat it anyway
