Zenda, oldest lion in U.S., euthanized by Philadelphia Zoo

(Reuters) - The Philadelphia Zoo has euthanized a 25-year-old lioness believed to have been the oldest lion in the United States after the animal suffered an acute decline in mobility and behavior, the zoo said on Friday. Lioness Zenda, born at the Johannesburg Zoo in 1991, arrived in Philadelphia in 1993 and became a fan favorite over the years, the Philadelphia Zoo said in a statement. "This remarkable cat will be missed by staff and guests alike, particularly by the keepers who catered to her