The US Department of Agriculture on Tuesday announced it would no longer use cats in research that, according to a watchdog group, involved forced "cannibalism" and resulted in over 3,000 of the animals being put down since 1982.
Over more than three decades, in a laboratory in Beltsville, near the capital Washington, scientists fed cats and kittens meat possibly contaminated with the parasite toxoplasma gondii, according to the White Coat Waste Project (WCW).
The researchers then tested the cats' stools to confirm the presence of toxoplasma in the meat. After three weeks, they went on to euthanise the cats even though they were healthy.
At least 3,000 cats and kittens were used since 1982, according to WCW, which unveiled the "kitten slaughterhouse" in 2018.
For a decade -- ending in 2015 -- the department also bought hundreds of deceased cats and dogs in China, Vietnam, Ethiopia, Colombia and other countries to feed their cats and other animals, the group said.
Following the WCW 2018 investigation, lawmakers introduced bills to end the project.
Under pressure, USDA said that "the use of cats as part of any research protocol in any ARS (Agricultural Research Service) laboratory has been discontinued and will not be reinstated."
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