Ottawa County parks in Michigan got their first goat herd to do some invasive plant clearing, http://www.mlive.com/news/grand-rapids/index.ssf/2014/05/goats_already_hard_at_work_in.html.
Use of goats (or other livestock) for controlling invasive plants isn’t a new technique, but it has been regaining popularity. My dad and co-author used a pair of goats to clear honeysuckle and blackberries along our driveway in North Carolina back in the early ’70s. The goats eventually became the source for several strong tasting, stringy dinners. It may have been better to let them continue munching honeysuckle!