Your goal should be to have your lambs weighing 40 to 50 pounds at 6 to 8 weeks of age. Select breeding animals that have the ability to produce such lambs. Keep in mind your management program and the breed or breeds you are working with. Remember that many lambs from larger breeds may already weigh more than 40 to 50 pounds at 6 to 8 weeks, especially if they are creep-fed. Also, remember that ewe lambs need to weigh about 95 pounds at the beginning of the breeding season to successfully reproduce.
Good conformation is essential for sheep to achieve maximum efficiency as meat animals.
Fullness through the heart area. A good spring of ribs. A long, well-balanced body, with adequate skeletal size and scale. Good skeletal size and scale indicate a fast-growing animal. Sheep must be structurally and reproductively sound to remain productive for many years in the flock.