Certified Humane*: The birds are uncaged inside barns or warehouses, but may be kept indoors at all times. They must be able to perform natural behaviors such as nesting, perching, and dust bathing. There are requirements for stocking density and number of perches and nesting boxes. Forced molting through starvation is prohibited, but beak cutting is allowed. Compliance is verified through third-party auditing. Certified Humane is a program of Humane Farm Animal Care.

Cage-Free: As the term implies, hens laying eggs labeled as "cage-free" are uncaged inside barns or warehouses, but generally do not have access to the outdoors. They have the ability to engage in many of their natural behaviors such as walking, nesting, and spreading their wings. Beak cutting and forced molting through starvation are permitted. There is no third-party auditing.

Free-Roaming: Also known as "free-range," the USDA has defined this claim for some poultry products, but there are no standards in "free-roaming" egg production. This essentially means the hens are cage-free. There is no third-party auditing.

United Egg Producers Certified*: The overwhelming majority of the U.S. egg industry complies with this voluntary program, which permits routine cruel and inhumane factory farm practices. By 2008, hens laying these eggs will be afforded 67 square inches of cage space per bird, less area than a sheet of paper. The hens are confined in restrictive, barren cages and cannot perform many of their natural behaviors, including perching, nesting, foraging or even spreading their wings. Compliance is verified through third-party auditing. Forced molting through starvation is prohibited, but beak cutting is allowed. This is a program of the United Egg Producers.

Vegetarian-Fed: These birds are provided a more natural feed than that received by most laying hens, but this label does not have significant relevance to the animals’ living conditions.