As the majority of my shetland wethers go to the freezer at about 18 months I always have some wethers about. It is extra hay/haylage and some (only a little) feed over the winter, but also means I can tak ethe tup out without worrying about him (not all my fields are in sight of each other - fortunately, stops the boy mooching at the side of the fence for hours on end),, and I can keep female hogglambs and ewes together in one big field.
also am biased - I think hogget and/or mutton is just miles better meat than lamb!