Have you eaten mutton? I believe that meat is from an older sheep.
Plenty times. Often in a stew
Yeah, it's tougher than lamb. Obviously, lol. Best cooked long and slow in a stew to break down the meat. Still very nice, though. It's weird to me how beef can be tender, but veal (infant cow meat) is kind of a niche thing, at least in the UK. With sheep it's the other way round.