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Pasture Raised Laying Hens and Eggs vs Caged Hens

Pasture Raised Laying Hens and Eggs vs Caged Hens

Vitamins A, E and fatty acid composition of the eggs of caged hens and pastured hens

A Pennsylvania State University study compared the nutritional composition of eggs on cool-season grasses grass, alfalfa, and clover pastures to eggs produced commercially. The results show that the pastured eggs had higher levels of Vitamin A, Vitamin E, and Omega-3 fatty acids.

According to the study, pastured eggs had the following increases in nutritional value when compared to commercially produced eggs:

 

  • 38% more Vitamin A
  • Two times as much Vitamin E
  • More than two times the omega-3 fatty acids
  • Less than half the Omega-6 to omega-3 ratio

Among the pasture group, the eggs of hens foraging grasses had 23% more vitamin E than the eggs from hens on clover.

Important to note is that the researchers restricted the amount of feed to the pasture hens. The pasture hens received 38% less feed in the study. Caged hens received 113 grams per hen per day compared to 70 grams per hen per day for the pasture groups. As a result, the pastured hen egg production was down 15% and the pastured birds weighed 14% less.

Intentionally limiting the amount of feed to a significant level below the breed’s genetic requirements is not a recommended pastured poultry feeding practice because it will adversely affect performance.

A 2001 comparison of eggs produced in a real-world pasture system to conventionally produced eggs with similar nutritional findings to the Penn State study.

Source: Vitamins A, E and fatty acid composition of the eggs of caged hens and pastured hens, Kartsten, H.D., et al. Renewable Agriculture and Food Systems:  25(1); 45-54. 12 January 2010.

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