Bird flu kills 20 big cats at Washington animal sanctuary

Twenty big cats - including a Bengal tiger and four cougars - have died of bird flu over the past several weeks at an animal sanctuary in the state of Washington. "This tragedy has deeply affected our team, and we are all grieving the loss of these incredible animals," the Wild Felid Advocacy Center of Washington wrote in a post on Facebook. The devastating viral infection, carried by wild birds, spreads…