Following what it calls a 10-week undercover investigation, People for the Ethical Treatment of Animals is accusing Tyson Foods of mistreating birds at its chicken slaughter plant in Heflin, Ala.

At, PETA details its alleged findings and is pressuring Tyson to use controlled-atmosphere technology to slaughter chickens. Tyson has responded to the allegations by reiterating its commitment to animal welfare, noting that it was the first U.S. poultry company to establish an office of animal well-being.

Tyson is reviewing the Heflin facility and will take corrective action if necessary. It did question PETA's findings, saying that PETA's agent — a former plant employee — appeared to violate Tyson's animal-welfare policy by allowing conscious birds to enter the scald tank in order to videotape the occurrence.

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