White Striping Disease Hits 99% of U.S. Supermarket Chicken, Study Finds

  • Disease stems from fast-growth farming, Humane League says
  • Chickens with ailment have 224% higher fat content than normal
Photographer: Angel Garcia/Bloomberg
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Ten years ago, the poultry muscle disease known as white striping was almost nonexistent. Now, the fat-boosting ailment shows up in 99% of U.S. store-brand chickens, according to a Humane League study to be released Monday.

The animal-welfare nonprofit conducted an investigation in 29 states that found the affliction in virtually all grocery-store-brand chickens sampled. The illness is driven by the extreme conditions of factory farming, which turbocharges the raising process to a matter of weeks and puts undue physical stress on the animals, the Humane League said.