Open environment chickens1 (IMAGE) Washington State University Caption Open environment chicken farms, which keep their flocks outdoors, often keep a variety of breeds, including heritage breeds. Credit Olivia Smith, Washington State University Usage Restrictions For use only with stories associated with this press release License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.