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Cats Are Not the Best Defenders of Ecological Health

A feral cat prowling among baby penguins on Macquarie Island, south of mainland Australia.Geoff Copson / Australian National Parks and Wildlife Service

fter a cat loses its last aesthetic and behavioral traits characteristic of a kitten, it also loses much of its appeal as a companion to some people. At the same time, this cat may begin going into heat, agitating itself in a way that is both embarrassing and unsettling. With the human’s affection wearing thin, the cat might gaze longingly out the window. Sensing an

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