Goats try everything but only eat what is nutritious and/or they think tastes good. I have seen videos of goats used to clear land. Then after the goats come the hogs uprooting trees. Chickens come after bugs including the maggots hanging out at cow pies. Cows are first because they trample everything including the briars. Goats eat kudzu.
Goats are social animals. You cannot have just one goat. Cow's milk is bad for humans. You might want to save money on goat feed by broadcasting some seeds so they can eat the plants. If you are in the South and have a portable fence, you can hire them out to Kudzu and poison Ivy.