Linked from
The 9 pages that link to Lamb and mutton, each with the reason it gives.
SheepRelated: Sheep are raised as livestock for meat at different ages.
Sheep farmingRelated: Meat production shapes lambing schedules, finishing, and slaughter decisions.
Domestic sheepRelated: Sheep are raised and slaughtered for both categories of meat.
BeshbarmakRelated: Lamb or mutton often replaces horse meat or accompanies it in the dish.