This is a great, eco-friendly idea. I live 5 minutes from the Oakland Zoo (NorCal) and in the middle of summer, they rent the goats to clean the area. Its truly a sight to behold, hundreds of goats at once eating away at the very dry brush. They can eat a large area in just a few days and often times, they're left alone. I don't believe anyone is watching them. Members of my family have thought of stealing one or two, don't think they will be missed. They should be used more often.