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From Today's New York Times

Animal Ethics

They’re about protecting a system that produces cheap food. The idea that eggs from free-range chickens are somehow morally superior to other eggs is, frankly, weird. BOBBIE MULLINS Norfolk, Va., Are they happier scratching around the barnyard or sitting confined in cages?

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Feral Cats Are An Invasive Species in North America (and elsewhere)

10,000 Birds

Free-ranging domestic cats have been introduced globally and have contributed to multiple wildlife extinctions on islands. We estimate that free-ranging domestic cats kill 1.4–3.7 Here we conduct a systematic review and quantitatively estimate mortality caused by cats in the United States. billion birds and 6.9–20.7

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From Today's New York Times

Animal Ethics

To the Editor: Re “ Suddenly, the Hunt Is On for Cage-Free Eggs ” (front page, Aug. The rooster watches over the flock protectively and often participates in a hen’s egg-laying ritual, an extremely important and private part of her life.