We are thinking about getting a couple of either goats, pigs or sheep. We want something that will 'mow' weedy areas. I read the posts on "sticker eaters" but I am wondering if any of these can be penned with the chickens, what makes the best watchdog, or what would be most recommended. Thanks in advance for any advice! By the way, I am not interested in meat, milk or breeding, so wethers are fine.