| Some large commercial breeding flocks were reared on pasture into the 1950s | has caused some people to look for alternative terms |
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| Free-range poultry [ ] Free range meat chickens seek shade on a U | The range should be largely covered in vegetation and allow more space |
A behavioral definition of free range is perhaps the most useful: "chickens kept with a fence that restricts their movements very little.
5| RSPCA Approved Farming standards for free range require an indoor stocking density of about 17 birds per m2, and outdoor densities of up to 17 birds per m2 | The Pastured Poultry concept is promoted by the American Pastured Poultry Producers' Association APPPA , an organization of farmers raising their poultry using Salatin's principles |
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| Nutritional science resulted in the increased use of confinement for other livestock species in much the same way |
United States [ ] In the , the free range regulations currently apply only to poultry and indicate that the animal has been allowed access to the outside.