I was going to say, Americans don't generally eat mutton but lamb isn't terribly uncommon. Lamb is already difficult to get right, which is why many go out to g

I was going to say, Americans don't generally eat mutton but lamb isn't terribly uncommon. Lamb is already difficult to get right, which is why many go out to get it (Indian and Middle Eastern, most commonly); mutton is even more difficult, so people don't even bother either way. In addition, goat isn't often eaten in Europe (outside of the Mediterranean, Italy primarily) and other affluent nations, but is fairly common (at least in the Southwest and New York+DC) via Latin American, Middle Eastern and African cuisine infusion.