Sheep casings are very tender, and thus the ends are not often tied using hog rings. Twisting the ends is a common method when making sausage links. Turn one end of the casing counterclockwise, then tie the other end in a clockwise direction. This twist alternation helps to better secure the casings. Butcher’s twine is also another useful method that is very effective for sheep casings. It also makes for artisanal-looking sausages, ideal for a brunch meal.