The Farm Station Lamb Castration rings are made from natural latex, and allow you to dock the lamb’s tail. Docking improves the health and welfare of sheep and lambs, preventing faecal matter from accumulating on the tail and hindquarters of the animal. Apply a rubber ring to the tail using the applicator tool, the bands will then cut off the blood supply to the tail, causing the tail to fall off in 7 to 10 days.