Hi all, I am looking into getting a pair of goats -or sheep?- for my backyard. They would be pets and our official lawn mowers. Our land is flat but there are large rocks everywhere which makes mowing all but impossible. We have half an acre, fully fenced with chainlink. Goats would need to get along with my little boys(ages 3 and 5) and preferably not climb on cars. Any breed recommendations? I am looking at neutered males mostly to keep things simple.