Rep. Nancy Mace (R-S.C.) accused Dr. Anthony Fauci and the National Institutes of Health of "sending puppies to slaughter" Monday after she sent a letter demanding answers to reports that taxpayer money from his department was used to subject dogs to abusive and inhumane experimental testing.

Mace told "Fox News Primetime" that she began looking into the White House medical advisor's department following reports that hundreds of thousands of U.S. taxpayer dollars were used to subject dogs to cruel testing before ultimately killing them. What she found was nothing short of "barbaric and gruesome scientific experiments," she said.

"What we learned recently is that Dr. Fauci is sending puppies to slaughter basically. I learned a few weeks ago that a grant worth about $1.68 million was spent to take 44 beagle puppies, to take their vocal cords out so the scientists couldn’t hear their cries or their barks. They were then drugged, killed and dissected. Almost $2 million to kill 44 beagle puppies," she told guest host Brian Kilmeade.

Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, listens during a Senate Health, Education, Labor, and Pensions Committee confirmation hearing in Washington, D.C., U.S., on Tuesday, July 20, 2021. The top U.S. infectious-disease expert yesterday said the delta variant of the coronavirus is causing a significant increase in infections and the Biden administration is "practically pleading" with people to get vaccinated. Photographer: Stefani Reynolds/The New York Times/Bloomberg via Getty Images (Stefani Reynolds/The New York Times/Bloomberg via Getty Images)

A report from the White Coat Waste Project that was based off a Freedom of Information Act request with the National Institutes of Allergy & Infectious Disease found that more than $400,000 in taxpayer money was spent on canine experiments during which beagles were infected with parasites via biting flies. Mace said the insects "are literally eating beagles alive from the neck up."

 "Why are we wasting this kind of money on these kinds of barbaric and gruesome scientific experiments on these sweet and innocent animals?" she asked. "These poor dogs killing them with our money. Terrible. We would never do this here in the U.S."

The Project reported that Dr. Anthony Fauci's bureaucracy's budget in 2021 is an estimated $6 billion and that documents obtained through FOIA show evidence of a study in which otherwise healthy beagles were treated with an experimental medication before being introduced to biting flies that were carrying a parasite known to be contagious to humans.

"It’s disgusting," Mace said. "And it’s as if those lies about Covid-19 were not bad enough, now, they there is this. The more I learn about what is going on with taxpayer dollars and these grants that we’re sending to other countries overseas, literally the worse it gets," she continued. "I have been an animal rights activist for a long time. I promised to work across the aisle with Democrats and Republicans when we agreed on an issue. This is one where millions of Americans agree. This should stop and should stop immediately."

Mace was joined by 23 Democrat and Republican colleagues who signed on to her letter demanding answers from the NIH. 

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The congresswoman said that if Fauci does not respond within a number of days, she "will have to ratchet it up." As for future experiments, Mace said she hopes the country will come together in a bipartisan fashion to prevent such treatment of animals moving forward.

"I expect a response from the NIH or grants funded under that program," she said. "It’s devastating. If this is will bring our country together to…do the right thing to save these animals from slaughter in the future I am for it," she said, before adding, "Dr. Fauci has got to be held accountable for everything he has done to this country in the last years. It’s devastating."