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Ken never acted violently or aggressively towards zoo patrons or animals.
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In 1985, during his three escapes on June 13, July 29, and August 13, Ken Allen peacefully strolled around the zoo looking at other animals. Ken Allen developed prostate cancer and was euthanized on December 1, 2000. A song, "The Ballad of Ken Allen", was written about him. He had his own fan club, and was the subject of T-shirts and bumper stickers (most reading "Free Ken Allen"). Ken Allen's ability to outwit his keepers, as well as his docile demeanor during his escapes, resulted in fame.
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During some of his escapes, his female companions joined him. In 1985, he gained worldwide attention for a series of three escapes from his enclosure, which had been thought to be escape-proof. Ken Allen was born in captivity at the San Diego Zoo in 1971. He became one of the most popular animals in the history of the zoo because of his many successful escapes from his enclosures. Ken Allen (Febru– December 1, 2000) was a Bornean orangutan at the San Diego Zoo. For people named Ken Allen, see Kenneth Allen (disambiguation).
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