In the UK it was more down to marketing - mutton fell out of favour but lamb remained popular. But it seems different factors were at play in the US
In 1861, Abraham Lincoln served roast mutton at his inaugural dinner. America once had over 50 million sheep. Today, the average American eats just one pound of lamb per year — and mutton? You can't even find it in most grocery stores.
So what happened?
The answer involves bloody range wars between cowboys and shepherds in the Wild West, a World War II feeding disaster that traumatized an entire generation, a chemical invention that destroyed the wool industry overnight, and the most successful meat marketing campaign in history.
This is the story of how America forgot an entire meat.