The oldest polar bear in the U.S., a Philadelphia Zoo resident named Klondike, was euthanized Friday after what staff called a “recent and substantial decline in her medical condition.” The bear had begun experiencing difficulty standing up and walking two weeks ago and veterinarians had treated her for a urinary tract infection that did not seem to improve. “Given her advanced age and poor prognosis, zoo staff decided the best decision would be to humanely euthanize her,” the zoo said in a Facebook post.
