If you have a big lawn you're tired of mowing or have overgrown land you need to clear, there are some four-legged friends who are hungry for the job. Prosperity Acres Farm in Sunderland, Md. has what it calls "green goats." As an alternative to using herbicides, property owners in Southern Maryland can hire the goats to chow down on unwanted vegetation. Many of the things goats feast on, are things you don't even want to touch. "They love the wild rose bushes, poison ivy, poison sumac, poison oak. (They're) not a problem for them whatsoever," says farm owner Mary...