All I can think of is putting a muzzle on the biter but that depends on how long they are out in the field for. If it's just for a few hours run around it would be ok but obviously not if they live out. Or I wonder if Cribox is safe to put on the bitee? I mean it's safe to eat so it should be safe for skin shouldn't it? Maybe just spraying the rugs so they smell of it would be deterrent enough.