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Sheep's milk

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Lacaune dairy sheep in rotary parlour, Aveyron, France

Sheep's milk (or ewes' milk) is the milk of domestic sheep. It is commonly used to make cultured dairy products, such as cheese. Some of the most popular sheep cheeses include feta (Greece), Pecorino romano (Italy), Roquefort (France) and Manchego (Spain).

Sheep breeds

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Specialized dairy breeds of sheep yield more milk than other breeds. Common dairy breeds include:

In the U.S., the most common dairy breeds are the East Friesian and the Lacaune.[1] Meat or wool breeds do not produce as much milk as dairy breeds, but may produce enough for small amounts of cheese and other products.

Milk production period

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Sheep milk has the third highest CO2 emissions intensity of any agricultural commodity.

Female sheep (ewes) do not produce milk constantly. Instead, they produce milk during the 80–100 days after lambing.[2] Sheep naturally breed in the fall, which means that a majority of lambs are born in the winter or early spring. Milk production decreases and eventually stops when lambs are weaned or the days are shorter.[1] Milk cannot be produced year-round.[3] Through the use of controlled internal drug release (CIDR), ewes can be bred out of season. CIDR drugs contain progesterone, which is slowly released into the bloodstream, bringing the animal into estrus.[4] In this way, ewes can be bred at different times throughout the year, providing farms with a year-round supply of milk.

Meat and wool breeds of sheep lactate for 90–150 days, while dairy breeds can lactate for 120–240 days. Dairy sheep can produce higher yields of milk per ewe per year. Dairy sheep can produce 400–1,100 lb (180–500 kg) of milk per year while other sheep produce 100–200 lb (45–91 kg) of milk per year. Crossbred ewes produce 300–650 lb (140–290 kg) of milk per year.[1]

Products made from sheep's milk

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Sheep milk cheeses include the feta of Greece, Roquefort of France, Manchego of Spain; Serra da Estrela from Portugal; pecorino Romano (the Italian word for sheep is pecora) and pecorino Sardo of Italy; Pag cheese of Croatia; Ġbejna of Malta; and Gomolya of Hungary; and Bryndza (Slovenská bryndza from Slovakia, brânza de burduf from Romania and Bryndza Podhalańska from Poland).

Whey cheeses are also made from sheep's milk: various ricottas of Italy (but the best-known are made from buffalo milk); anthotyros, mizithra, manouri, and xynomizithra of Greece (often with goat milk mixed in); various requeijão in Portugal.

In Greece, yogurt is often made from sheep's milk.

Nutrition by comparison

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Mechanical sheep's milker, South Island, New Zealand
Milk composition analysis, per 100 grams[5]
Constituents Unit Cow Goat Water buffalo Sheep
Water g 87.8 88.9 81.1 83.0
Protein g 3.2 3.1 4.5 5.4
Fat g 3.9 3.5 8.0 7.0
—Saturated g 2.4 2.3 4.2 3.8
—Mono-unsaturated g 1.1 0.8 1.7 1.5
—Polyunsaturated g 0.1 0.1 0.2 0.3
Carbohydrate (lactose) g 4.8 4.4 4.9 5.1
Energy kcal 66 60 110 95
kJ 275 253 463 396
Cholesterol mg 14 10 8 11
Calcium IU 120 100 195 170

Sheep's milk is exceptionally high in fat and conjugated linoleic acid (CLA) and has a high level of solids,[6] as compared to other kinds of milk, making it very suitable for cheese-making. In particular, sheep's milk produces much more cheese than the same amount of cow's milk.[7]

See also

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References

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  1. ^ a b c Berger, Yves (2010). "Guide to Raising Dairy Sheep" (PDF).
  2. ^ Milk production period
  3. ^ "Using Sheep CIDRs - Premier1Supplies Sheep Guide". Premier1Supplies Sheep Guide. 2012-10-15. Retrieved 2016-11-25.
  4. ^ "CIDR".
  5. ^ "McCane, Widdowson, Scherz, Kloos". Archived from the original on 2007-09-29. Retrieved 2008-10-27.
  6. ^ "What is Conjugated Linoleic Acid (CLA)?". modernfit. 2014-11-27. Retrieved 2016-07-09.
  7. ^ Sinanoglou, Vassilia (2015). "Assessment of lactation stage and breed effect on sheep milk fatty acid profile and lipid quality indices". Journal of Dairy Science and Technology. 95 (4): 509–531. doi:10.1007/s13594-015-0234-5. S2CID 86067647.
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