SALISBURY, Md. — The chickens in one pen were, for the most part, doing what they usually do toward the end of their lives on a factory farm: resting on the floor, attacking the feeding pan, getting big fast.
But in the next pen over, smaller, leaner birds of the same age ran around, raising a ruckus as they climbed on haystacks, perched on roosts and gave themselves dirt baths.
“We’re going to have to come up with a sturdier water line,” said Dr. Bruce Stewart-Brown, a veterinarian and senior vice president of Perdue Farms, as he watched two of them swing the tube that supplies water to the pen.
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