Modern chicken breeding represents perhaps the largest form of systematized animal cruelty humans have ever invented. Researchers say that cruelty can be mitigated inexpensively. | Catherine Falls Commercial via Getty Images According to a new commentary paper in the journal Nature Food, some of the worst animal suffering in the world can be prevented at a rate of just a couple of pennies per hour: the extreme pain experienced by chickens raised for meat.  Over the last 75 years, chickens have been bred to grow incredibly large and incredibly fast. Their rapid growth rate has made chi...

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