Lamb, Hogget, and mutton are all terms for the meat of domestic sheep (Ovis aries). Lamb meat is lamb flesh, a lamb is a sheep in its first year, and Hogget is a second-year sheep. Mutton is a type of meat that comes from older sheep. “Hogget” and “sheep meat” are not commonly used phrases outside Norway, New Zealand, South Africa, and Australia. Hogget is becoming increasingly popular in England, particularly in the north (Lancashire and Yorkshire), connected with the rare breed and organic farming.
The way you cook the meat may also make it a healthier choice.