Goats don't want a pretty pasture to live in.
Our Mini Nubian and Boer goats would prefer to roam the woods and eat trees, poison ivy and other yummy things that most humans want to spray round up on. If you are looking for a organic way to clear some land, get some goats. They will clear away all of that unwanted brush and under growth for you. Not to mention that goat poop is a good source of fertilizer.
Think of goats as Nature's weed eaters!