By Anne Lichtenwalner, DVM, PhD, University of Maine Cooperative Extension Since late last year, a real problem for poultry producers has arisen in the United States: highly pathogenic avian influenza (HPAI). In late 2014, following a cluster of cases in southwestern Canada, HPAI (contagious bird flu) was isolated from birds in backyard poultry flocks in read more June 1, 2015: Update on Avian Influenza in the United States