Jamie McDonald/Getty ImagesTwo people have died and hundreds more have become ill in an ongoing outbreak of salmonella linked to backyard chickens, the Centers for Disease Control and Prevention said Friday. The news came as the CDC also said a salmonella outbreak traced to pig ear dog treats continues to sicken people in multiple states. Since the illnesses related to backyard poultry began January 1, more than 768 people in 48 states have become ill, the CDC said. Among infections linked to the dog treats, 93 people have been reported ill, including 48 cases reported since July 3, the centers said. Since 2000, more than 75 outbreaks have been linked to backyard poultry, the CDC said.