Fences. GOOD fences. Watch out for neighborhood dogs who, singly or in packs, love to chase anything that will run from them. Packs of "nice" dogs do a hellish lot of damage, even while their owners are swearing they are sweethearts and would never touch an animal. If seen, they can be discouraged with strong sprays of water mixed with ammonia, which burns but won't do much damage. Otherwise, always be alert for any dogs not in their owners' yards.