Two cats this week visited lawmakers who have played a role in ending a decades-old Agriculture Department program that performed experiments on the felines.

The cats, Delilah and Petite, who had survived the so-called kitten slaughterhouse visited Sen. Jeff Merkley Jeffrey (Jeff) Alan MerkleyThe Hill's Morning Report - Sponsored by The Air Line Pilots Association - Trump, Biden renew push for Latino support Sunday shows - Trump team defends coronavirus response Oregon senator says Trump's blame on 'forest management' for wildfires is 'just a big and devastating lie' MORE (D.-Ore.) and Rep. Brian Mast Brian Jeffrey MastSen. Rand Paul says he and his wife were 'attacked by an angry mob' after Trump speech Florida Republican apologizes after Facebook posts about sex, rape uncovered Most Black women since 2004 running for office this year MORE (R.-Fla) on Thursday, according to NBC News.

ADVERTISEMENT

They were brought to the Capitol by advocacy group White Coat Waste Project (WCW), which seeks to end "taxpayer-funded experiments on dogs, monkeys, cats and other animals," according to its website.

WCW confirmed the visit in a statement to The Hill, noting that the cats had been adopted out by the Agriculture Department.

"I’m so glad you're freed," Merkley said while holding Delilah in his office, NBC reported.

Mast also said he appreciated the visit.

"It's not often that you necessarily get to just, you know, have in your office and see the results of some of the work that you do," Mast said. "For me, it's nice to have you bring them in here, and to see the results of a little bit of the work that we got to do out there."

ADVERTISEMENT

According to NBC News, the Agriculture Department in 1982 began infecting cats with toxoplasmosis and then euthanizing them to try to learn how to fight the disease at a lab in Maryland.

"But these were healthy, healthy adoptable kittens," WCW President Anthony Bellotti told NBC. "Toxoplasmosis is something that is treatable."

The group also said experiments at the facility included feeding cats tainted cat meat, the WCW found.

The $22 million program resulted in the deaths of 3,000 cats, NBC reported.

Both Delilah and Petite, who visted the lawmakers, had been used to breed kittens for the lab.

Mast and Merkley had introduced legislation called the Kittens in Traumatic Testing Ends Now Act to stop the testing. The Agriculture Department later announced it would end the program in April.