It's mentioned in the OPer's Washington Post article. "In 2014, according to its own records, it took in 3,017 animals, about 1 percent of the total number brought to private Virginia shelters."
Also: "And PETA doesn’t care if the animal in need is a dog or a cat or a chicken or a rat, Nachminovitch continued. It doesn’t matter if the owner can’t or won’t pay for the services. More than 500 of the animals it euthanized last year were brought in by owners who wanted to end their elderly or suffering pet’s pain, she said, but couldn’t afford the vet’s fee."