We have the tools to trim our OSB sows feet but haven't done so yet. We have no concrete and Flo is now about 18 months old and has lived all her life on grass/ mud, so her hooves do look a bit long. She's a lovley lady and quite likes a belly rub so we just have to entice her down then while one rubs the belly the other will nip and file. We brought horse hoove trimmers and something that looks like a builders file. Will let you know how we get on!