Lamb and mutton
||The examples and perspective in this article deal primarily with the English-speaking world and do not represent a worldwide view of the subject. (April 2013)|
Lamb, hogget, and mutton (UK, New Zealand and Australia) are the meat of domestic sheep (species Ovis aries). The meat of a sheep in its first year is lamb; that of a juvenile sheep older than one year is hogget; and the meat of an adult sheep is mutton.
Distinct from the meat, a lamb (singular with the indefinite article) or lambs (plural) also describes live juvenile sheep, which may or may not be used for meat. In Australia, the term prime lamb is often used to refer to lambs raised for meat.
Classifications and nomenclature 
The definitions for lamb, hogget and mutton vary considerably between countries.
In New Zealand, they are defined as follows:
- Lamb — a young sheep under 12 months of age which does not have any permanent incisor teeth in wear
- Hogget — a sheep of either sex having no more than two permanent incisors in wear
- Mutton — a female (ewe) or castrated male (wether) sheep having more than two permanent incisors in wear.
- Lamb — 0 permanent incisors; female or castrate entire male ovine 0–12 months (note that the Australian definition requires 0 permanent incisors, whereas the New Zealand definition allows 0 incisors 'in wear'.)
Under current United States federal regulations, only the term 'lamb' is used:
- Lamb — ovine animals of any age, including ewes and rams
The term 'mutton' is rare and 'hogget' unknown in the United States.
Younger lambs are smaller and more tender. Mutton is meat from a sheep over two years old, and has less tender flesh. In general, the darker the colour, the older the animal. Baby lamb meat will be pale pink, while regular lamb is pinkish-red.
Other definitions include:
- Milk-fed lamb — meat from an unweaned lamb, typically 4-6 weeks old and weighing 5.5 to 8 kg; this is almost unavailable in countries such as the USA and the UK, where it is considered uneconomic. The flavour and texture of milk-fed lamb when grilled (such as the tiny lamb chops known as chuletillas in Spain) or roasted (lechazo asado or cordero lechal asado) is generally thought to be finer than that of older lamb. The areas in northern Spain where this can be found include Asturias, Cantabria, Castile and León, and La Rioja. Milk-fed lambs (and kids) are especially prized for Easter in Greece, when they are roasted on a spit.
- Young lamb — a milk-fed lamb between six and eight weeks old
- Spring lamb — a milk-fed lamb, usually three to five months old, born in late winter or early spring and sold usually before July 1 (in the northern hemisphere).
- Sucker lambs — a term used in Australia — includes young milk-fed lambs, as well as slightly older lambs up to about seven months of age which are also still dependent on their mothers for milk. Carcases from these lambs usually weigh between 14 and 30 kg. Older weaned lambs which have not yet matured to become mutton are known as old-season lambs.
- Lamb — a young sheep that is less than one year old
- Yearling lamb — a young sheep between 12 and 24 months old
- Saltbush mutton - a term used in Australia for the meat of mature Merinos which have been allowed to graze on atriplex plants
- Salt marsh lamb (also known as 'saltmarsh lamb' or by its French name, agneau de pré-salé) is the meat of sheep which graze on salt marsh in coastal estuaries that are washed by the tides and support a range of salt-tolerant grasses and herbs, such as samphire, sparta grass, sorrel and sea lavender. Depending on where the salt marsh is located, the nature of the plants may be subtly different. Salt marsh lamb has long been appreciated in France and is growing in popularity in the United Kingdom. Places where salt marsh lamb are reared in the UK include Harlech and the Gower Peninsula in Wales, the Somerset Levels and Morecambe Bay.
Butchery and cookery 
The meat of a lamb is taken from the animal between one month and one year old, with a carcase (carcass in American English) weight of between 5.5 and 30 kilograms (12 and 65 lbs). This meat generally is more tender than that from older sheep and appears more often on tables in some Western countries. Hogget and mutton have a stronger flavour than lamb because they contain a higher concentration of species-characteristic fatty acids and are preferred by some. Mutton and hogget also tend to be tougher than lamb (because of connective tissue maturation) and are therefore better suited to casserole-style cooking, as in Lancashire hotpot, for example.
Lamb is often sorted into three kinds of meat: forequarter, loin, and hindquarter. The forequarter includes the neck, shoulder, front legs, and the ribs up to the shoulder blade. The hindquarter includes the rear legs and hip. The loin includes the ribs between the two.
Lamb chops are cut from the rib, loin, and shoulder areas. The rib chops include a rib bone; the loin chops include only a chine bone. Shoulder chops are usually considered inferior to loin chops; both kinds of chops are usually grilled. Breast of lamb (baby chops) can be cooked in an oven.
Forequarter meat of sheep, as of other mammals, includes more connective tissue than some other cuts, and, if not from a young lamb, is best cooked slowly using either a moist method, such as braising or stewing, or by slow roasting or American barbecuing. It is, in some countries, sold already chopped or diced.
Lamb shank definitions vary, but generally include:
- Lamb shank is cut from the arm of shoulder, contains leg bone and part of round shoulder bone, and is covered by a thin layer of fat and fell (a thin, paper-like covering).
- Lamb shank is a cut of meat from the upper part of the leg.
Thin strips of fatty mutton can be cut into a substitute for bacon called macon.
Lamb tongue is popular in Middle-Eastern cuisine both as a cold cut and in preparations like stews.
New Zealand, Australia, UK and Canada 
- Scrag end (of neck)
- Middle neck
- Best end (of neck)
- Chump (and chump chops)
- Leg (gigot in Scotland)
US and Ireland 
- Square cut shoulder – shoulder roast, shoulder chops and arm chops
- Rack – rib chops and riblets, rib roast
- Loin – loin chops or roast
- Leg – sirloin chops, leg roast (leg of lamb)
- Shanks (fore or hind)
National cuisines 
Meat from sheep features prominently in several cuisines of the Mediterranean, for example in Turkey; in North Africa and the Middle East; in the Basque culture, both in the Basque country of Europe and in the shepherding areas of the Western United States. In Northern Europe, mutton and lamb feature in many traditional dishes, including those of the North Atlantic islands and of the United Kingdom, particularly in the western and northern uplands, Scotland and Wales. It is also very popular in Australia. Lamb and mutton are very popular in Central Asia and in certain parts of China, where other red meats may be eschewed for religious or economic reasons. Barbecued mutton is also a specialty in some areas of the United States (chiefly Owensboro, KY) and Canada. However, meat from sheep is generally consumed far less in North America than in many European, Central American and Asian cuisines.
In Australia, the leg of lamb roast is considered the national dish. Commonly served on a Sunday or any other special occasion, it can be done in a kettle BBQ or a conventional oven. Typical preparation involves covering the leg of lamb with butter and rosemary springs pushed inside incisions cut in the leg, and rosemary leaves sprinkled on top. The lamb is then roasted for two hours at 180°C (360°F) and typically served with carrots and potato (also roasted), green vegetables and gravy.
Lamb's liver, known as lamb's fry in New Zealand and Australia, is eaten in many countries and, along with the lungs and heart (the pluck), is a major ingredient in the traditional Scottish dish of haggis. Lamb testicles, also known as lamb's fries (a term also used for other lamb offal), is another delicacy. Lamb's liver is the most common form of offal eaten in the UK, traditionally used in the family favourite (and pub grub staple) of liver with onions and/or bacon and mashed potatoes. Split grilled lamb kidneys are a popular breakfast item in Ireland.
See also 
- K.F. Warner, "Boning Lamb Cuts", Leaflet 74, U.S. Department of Agriculture, Bureau of Animal Industry, June 1931. full text
- Oxford English Dictionary Third edition, August 2010; online version November 2010
- The term 'hogget' was only added to the U.S. National Agricultural Library's thesaurus in 2009
- http://www.abare.gov.au/publications_html/livestock/livestock_00/lamb.pdf Australian Prime Lamb Industry, 2000
- Delbridge, Arthur, "The Macquarie Dictionary", 2nd ed., Macquarie Library, North Ryde, 1991
- Code of Federal Regulations 7:XI:1280.111 http://edocket.access.gpo.gov/cfr_2005/janqtr/pdf/7cfr1280.114.pdf
- Merriam-Webster Dictionary, s.v. hogget: "chiefly British"
- Sheep CRC
- Keating, Sheila. "Food Detective: Salt Marsh Lamb." The Times Online, 28 June 2008.
- Fearnley-Whittingstall, Hugh. "What Is Mutton - Understanding the History." Mutton Renaissance.
- Larousse Gastronomique(2001), ISBN 0-600-60235-4
- Delbridge, Arthur, The Macquarie Dictionary, 2nd ed., Macquarie Library, North Ryde, 1991
|Wikibooks Cookbook has a recipe/module on|