The sheep I buy are Dorper. We kill them at about 14 months, at the heaviest bodyweight they can produce, about 220 pounds. This maximizes the meat production of each animal. VERY IMPORTANT: the sides hang for 3 to 3 1/2 weeks. The dry age is very important. Stew the shanks, but eat the rest of the meat at medium rare. The chops are the best meat I've ever eaten, bar none. If you can create a market for dry-aged mutton, you will be busy, and all you have to do to create the market is serve the product. I buy 5 at a time, so a chest freezer is an important part of the equation.