Jackie, the celebrity Big Bear bald eagle who has been undergoing treatment for unexplained anemia since being rescued last month, experienced an "incredibly difficult" past 24 hours, her veterinary team said in an update Sunday. WATCH HERE WATCH HERE"While this is a small improvement, her PCV remains critically low and her overall condition remains extremely serious," the facility said. The team looking after Jackie — referred to by the center as Patient 26-519 — includes nine veterinarians and representatives from the U.S. Jackie and her mate Shadow rose to stardom after the installation of 24/7 livestream cameras above a nest near Big Bear Lake. The cameras are operated by the nonprofit Friends of Big Bear Valley.