They are mainly raised for wool and meat production especially when crossed with the progeny of a Welsh Mountain ewe. For example, a purebred upland ewe such as a Welsh Mountain ewe, might be bred with a breeding sire Bluefaced Leicester ram. This is a Welsh Mule, one of many different types of half-bred ewes. The lamb produced when a half-bred ewe is crossed with a Suffolk ram (as well as with other terminal sire breeds such as Texel, Beltex, or Charollais) is considered ideal for meat production, since they have unusually good conformation. The lamb has the easy-care benefits of a mountain ewe, as well as the excellent growth of the Suffolk ram. The Suffolk breed is also more resistant to elf fire, a disease brought on by eating, among others, the bog asphodel. Sunlight worsens the condition, but the black head and ears of the Suffolk limit sunlight down to the otherwise exposed skin.
Suffolk sheep are also shown in youth and adult shows. Organizations such as the FFA and 4-H allow middle-school and high-school students to learn responsibility by showing market lambs and breeding ewes. The sheep may be purebred or commercial (crossbred).
They are a large breed of sheep. Mature weights for rams range from 250 to 350 lb (110 to 160 kg), ewe weights vary from 180 to 350 lb (80 to 160 kg). Fleece weights from mature ewes are between 5 and 8 lb (2.3 and 3.6 kg), with a yield of 50% to 62%. The fleeces are considered medium wool in type, with a fiber diameter of 25.5 to 33 microns and a spinning count of 48 to 58. They have black faces and legs, a large frame, and are highly muscular. The staple length of ranges from 2.0 to 3.5 in (51 to 89 mm).
- Mitchell, G. B. B. (1988). "Non-parasitic skin diseases of sheep". In Practice. 10 (2): 69. doi:10.1136/inpract.10.2.69.
- Preparation of Australian Wool Clips, Code of Practice 2010-2012, Australian Wool Exchange (AWEX), 2010
- "Suffolk". Breeds of Livestock. Oklahoma State University, Dept. of Animal Science. Retrieved 2009-03-30.
- Congenital and Inherited Anomalies of the Musculoskeletal System in Sheep: Spider lamb syndrome, at the Merck Veterinary Manual; published December 2013; retrieved December 28, 2013
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