Open environment chickens2 (IMAGE) Washington State University Caption Open environment chicken farmers allow their flocks to roam outside as opposed to commercial producers who tend to keep poultry in fully enclosed barns. 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.