We were trying to think of how best to contain the sheep and goats in particular. And have a very steep hill we would like them to clear. Has anyone used successfully invisable fence collars to contain sheep, goats or even cows? One company said they sell systems to people who do just that, and I found an experimental thing with some cows in MD on the web, though I haven't talked to a human yet. The wire is very cheap...$22 for 500ft, and can go through water, be buried or lay on top of the ground. The collars are about $55-65 each. I currently have 10 goats and sheep, though maybe I would just use a few in this way, especialy to try it. Wondering how one trains them, with dogs you lead them on a leash...(HA! I Know that will not work with most of my sheep!) Thoughts, experiences?