Merino

The Merino is a wool sheep that originated in Spain and is now kept across most of the world's major sheep-producing regions. No common breed produces a finer fleece: individual fibres are markedly thinner than those grown by meat or carpet-wool types, and this fineness explains why the breed has been bred, guarded and traded for hundreds of years.

A Merino is a medium-sized animal; both ewes and rams carry a dense fleece over most of the body. Several strains show loose folds of skin, particularly around the neck, which increase the area available for wool growth. The breed copes well with dry rangeland as much as with improved pasture, a hardiness that let it establish itself in Australia, South Africa, South America and parts of the western United States.

Temperament counts among the breed's most useful qualities. Merinos are placid, easily handled sheep, which makes large flocks simpler to gather, shear and manage than flightier breeds. They are highly gregarious, keeping together as a group and settling quickly once routine handling becomes familiar.

Who it suits

The Merino suits keepers whose chief interest is wool, from commercial fine-wool producers to handspinners after soft fibre. It rewards owners able to provide regular shearing, decent pasture and routine attention to parasites and feet. Its placid nature also makes it a workable choice for smallholders, provided the heavy coat and fly-strike risk are taken seriously; the National Sheep Association is a useful first point of contact for UK keepers new to fine-wool breeds.

The Merino developed in Spain, where fine-wool flocks were run as large migratory herds throughout the Middle Ages. Spanish wool became one of the country's most valuable exports, and the flocks producing it were managed under an organised system of transhumance, moving between summer uplands and winter lowland grazing.

For centuries, Spain kept tight control over the export of breeding stock, since the value of its wool depended on keeping the best animals at home. This restriction made the breed both highly prized and genuinely difficult to obtain elsewhere in Europe.

From the eighteenth century, small numbers of Spanish sheep were sent abroad, first to other parts of Europe and later to the southern hemisphere. These founder animals formed the basis of new national flocks. Australia in particular became a major centre of Merino breeding, and selection there produced strains suited to dry rangeland and large-scale wool production.

Breeders in different countries have since developed distinct types, varying in body size, skin folding and fleece weight, while retaining the trait that defines the breed: exceptionally fine wool. The Merino remains the foundation of fine-wool production in most sheep-farming nations today, and it has influenced numerous British and Continental wool breeds through crossing.

The Merino has a compact, medium-sized frame set on relatively short legs, carrying a deep, dense fleece over most of the body. The wool is white and finely crimped, covering the trunk, much of the legs and, in many strains, part of the face. Loose folds of skin, most obvious around the neck, are common and add to the wool-bearing area.

Horns vary by sex and strain. Rams of some bloodlines carry large spiral horns, while others are polled; ewes are usually hornless or carry only small horns. The face is typically clean-skinned and pale, though it can be partly obscured by wool growth around the eyes.

Coat and colour

The fleece is what defines the breed. Merino wool ranks among the finest produced by any sheep, with fibres so thin they give the yarn a notably soft handle. The fleece is dense and even, with a regular crimp that lends it elasticity. Standard Merino wool is white, so it takes dye readily once processed. Heavy wool growth on the face can cause wool blindness in some animals, and many breeders now select against excessive facial cover for this reason.

The Merino has a reputation for a calm, docile temperament. The breed is good-natured, and individual animals are generally straightforward to move and handle compared with flightier types. This steadiness matters in large flocks, where easy mustering and quiet behaviour at shearing time save labour and reduce stress on the sheep.

Merinos are strongly gregarious and prefer to stay together as a group; a sheep left on its own quickly becomes distressed, so they should never be kept singly. Around familiar handlers they settle fast and accept routine tasks such as drenching, foot trimming and shearing without much fuss.

The breed is not aggressive towards people, though horned rams need careful handling during the tupping season. Merinos coexist well with other grazing stock and show no territorial behaviour. Guardian dogs are sometimes used to protect flocks from predators rather than to manage behaviour within them.

Merinos need consistent management centred on the fleece and the feet. Their wool does not shed naturally, so shearing is essential rather than optional. The dense coat also leaves them more prone to fly-strike than smooth-coated breeds, which means hygiene around the tail area and well-timed shearing matter throughout the year.

Grooming

• Shear at least once a year; some flocks are shorn twice, depending on climate and wool length.
• Crutch (trim wool from around the tail and udder) between shearings to cut dung build-up and fly-strike risk.
• Check the fleece regularly for signs of strike, especially in warm, humid weather.
• Watch for wool blindness in heavily wooled faces and trim around the eyes where needed.

Exercise

• Give daily access to grazing so sheep can move and forage naturally.
• Rotate pasture to keep feed quality up and reduce worm burden.
• Allow enough space for the whole flock to move together, since Merinos travel as a group.

Environment

Merinos cope well with dry, open country and tolerate a range of climates. They need clean water, shade in hot weather, and shelter from cold wind and rain, particularly straight after shearing, when the fleece no longer insulates. Secure fencing and good drainage in the yard help prevent foot problems.

As ruminants, Merinos are built to live on pasture and other forage. Good grazing meets most of their needs for much of the year. Requirements rise during late pregnancy and lactation, and during dry spells when pasture quality drops. At those times hay, silage or grain-based supplements fill the gap. A constant supply of clean water is essential, and intake rises with heat and milk production.

Mineral balance affects both health and wool quality. Sheep on poor or restricted pasture may need supplementary minerals, and copper especially must be managed with care, since sheep tolerate very little excess.

Treats and supplements

Use supplements sparingly, and always alongside forage rather than instead of it. Sheep-specific mineral licks or loose minerals correct local deficiencies. Sudden changes to a high-grain diet can upset digestion, so any concentrate should be introduced gradually. Wool growth and fleece quality both respond better to steady, adequate nutrition than to occasional rich feeding.

Merinos are generally hardy sheep, coping well with demanding climates. Given good management they commonly live 10 to 12 years, though their productive breeding life is usually shorter. Most health problems in the breed stem from the same causes affecting sheep generally: internal parasites, foot disease and conditions linked to the fleece. The dense Merino coat brings a particular risk of fly-strike and, in some animals, wool blindness.

Preventive care

• Base a parasite-control plan on faecal egg counts rather than routine blanket drenching.
• Trim and check feet regularly and keep yards dry.
• Crutch and shear to schedule to cut fly-strike risk.
• Keep vaccinations up to date for the clostridial diseases common in your area.
• Provide appropriate minerals and avoid copper excess.

Merinos reach breeding maturity within their first year, though ewes are often put to the ram once well grown rather than at the earliest possible age. Many Merino strains breed seasonally, with mating timed so lambs arrive in suitable weather. Rams run with ewes for a set joining period, and ewe condition at mating strongly affects conception rates.

Gestation lasts around five months. Merino ewes most often produce a single lamb, with twins less common than in some specialised meat breeds; lambing percentage varies with strain, nutrition and management. Ewes are generally attentive mothers, and lambs are up and suckling soon after birth.

Rearing young centres on protecting newborn lambs from cold and predators, making sure they get colostrum early, and keeping ewes in good condition through lactation. Lambs are weaned after a few months. In breeding programmes, selection weighs wool fineness and fleece weight against fertility, growth and overall constitution, so the flock stays both productive and hardy.