One thing I discovered about pigs is that they can be a big
help clearing land. When my wife on 3 1/2 acres wanded
a couple acres of stumps and rocks removed, putting the pigs into a quarter of an acre, they dug up enough of roots
that my tractor could pull up whole stump. And the turned up buried stones so I could get them with stone boat.
The goats helped too. There was a tangle of barbed wire,
brambles, vines with thorns,bittersweet, and poison ivy. The goats ate back the green stuff, including poison ivy, exposing wire so I could cut out pieces of it. I wonder if the early settlers used animals to help clear land.