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Jack, a Norwegian forest cat who turned up at Kennedy Airport two months after escaping from his carrier, has died.
Jack's veterinarian gave him only a 50-50 chance of survival after he was found in October, two months after disappearing on Aug. 25 as his owner boarded a flight for San Francisco.
Jack was euthanized on Sunday.
A Facebook page dedicated to Jack said the feline had extensive wounds that would not heal due to the malnutrition he suffered while he was lost.
"Jack had been through so much, and the last thing anyone wanted was for him to suffer more," the Facebook post said. "Jack was bathed in love and crossed over just a few minutes ago."
Customs officials said Jack was found in poor health on Oct. 25 after falling through the ceiling of the airport's customs area.
American Airlines offered condolences to Jack's owner, Karen Pascoe. Jack and her other cat, Barry, were traveling in separate carriers.