Look for this Label

Treating animals humanely means allowing them to exercise their natural instincts and behaviors. Humanely raised cattle live on pasture and eat their natural diet of grass. Hogs are able to root, nest and farrow in open-ended barns, and chickens and turkeys have space to roam freely.
The Certified Humane Raised and Handled® program is a certification and labeling program that is the only animal welfare label requiring the humane treatment of farm animals from birth through slaughter. Their goal is to improve the lives of farm animals by driving consumer demand for kinder and more responsible farm animal practices. Certified Humane Raised and Handled® label means the food products have come from facilities that meet precise, objective standards for farm animal treatment.
Certified Humane is not the only way to be an Ethical Omnivore, but it takes out alot of the guess work to ensure the animals we eat have lead the lives of animals.
Check out their site for more information:
http://www.certifiedhumane.org/
I emailed Publix yesterday to find out if their GreenWise chicken is free range or if in the future they will become a Certified Humane Producer. I let you know what I find out.
But mean while I have found Applegate Farms and Organic Valley to be Certified Humane and available at our local markets (central Florida). The Certified Humane Website has a listing of our the Producers. The more we support the use of a labeling system the more producers will feel pressured to become certified. Providing more of a sections to the consumers. Easier the access to Humanely raised and slaugtered animals, them more people I believe with be interested in becoming an Ethical Omnivore.