Benefits of having a horse, and a goat

I think the tin can myth comes from the amazing variety of things that they will eat. I'm told that goats are the only animals that can (and will) eat poison ivy with no ill effects. I remember as a child a ride on the Ducks (WWII amphibious vehicles) at the Wisconsin Dells. At one point the ride would stop so people cound feed the wild goats that would come looking for handouts. I remember the guide telling us we could give them cigarets or chewing gum ("Don't bother unwraping it for them; the wraper if the best part.") A number of years later, I took the ride again. Going through the woods, the guide explained that the goat ot two we saw in the distance were all that was left of a herd of wild goats that used to live there. There were more, but too many people fed them cigarets.