Late on a Friday night, eight dog enthusiasts and their pet pooches prowl several dark alleys in New York's Lower East Side with one mission: to hunt and kill as many rats as possible.

The dogs, mostly terriers, pant and strain at their leashes before diving into trash bags and emerging seconds later with a convulsing rodent between their teeth.

Members of The Ryders Alley Trencher-fed Society (R.A.T.S.) searching for vermin on the New York City's Lower East Side on May 14, 2021
Members of The Ryders Alley Trencher-fed Society (R.A.T.S.) searching for vermin on the New York City's Lower East Side on May 14, 2021 AFP / Angela Weiss

"They're bred for the job. They're wired for the job. They live for the job," explained Richard Reynolds, organizer of the Ryders Alley Trencher-fed Society, or R.A.T.S. for short.

New York's furry rodents are notorious. Legend has it there are as many rats in the city as humans (some eight million), with public-health officials regularly testing new techniques to control the population, including placing dry ice in rat burrows to asphyxiate them.

Lita the wirehaired dachshund holds a dead rat in its mouth after hunting it in a neighborhood in lower Manhattan on May 14, 2021 in New York City
Lita the wirehaired dachshund holds a dead rat in its mouth after hunting it in a neighborhood in lower Manhattan on May 14, 2021 in New York City AFP / Angela Weiss

Shortly into the coronavirus crisis, America's Centers for Disease Control and Prevention warned of "unusual or aggressive rodent behavior" after restaurants and offices closed, disrupting food sources.

That hasn't deterred the men and women volunteers of R.A.T.S. and their dogs. They have been chasing vermin for about 30 years and have maintained their nocturnal meets during the pandemic, albeit slightly less regularly.

Alex Middleton stands with Rommel the Jagdterrier after it killed a rat in lower Manhattan on May 14, 2021 in New York City
Alex Middleton stands with Rommel the Jagdterrier after it killed a rat in lower Manhattan on May 14, 2021 in New York City AFP / Angela Weiss

Shorter-legged dogs such as Jagdterriers flush out rodents from piles of garbage, construction debris and bushes while faster, longer-legged dogs like Bedlingtons stand back, ready to pounce.

The rats killed by the Ryder's Alley Trencher-fed Society and their dogs are lined up at the end of the hunt in lower Manhattan on May 14, 2021
The rats killed by the Ryder's Alley Trencher-fed Society and their dogs are lined up at the end of the hunt in lower Manhattan on May 14, 2021 AFP / Angela Weiss

"It's a bit like X-Men," says Alex Middleton, a 36-year-old dog trainer. "Each dog has its own superpower."

Reynolds, 77, will sometimes pound trash cans with a metal stick to send rats scurrying, while Middleton frequently drops Rommel, a Jagdterrier, straight into dumpsters.

Rommel the Jagdterrier holds a dead rat in his mouth after hunting it in a dumpster in lower Manhattan on May 14, 2021
Rommel the Jagdterrier holds a dead rat in his mouth after hunting it in a dumpster in lower Manhattan on May 14, 2021 AFP / Angela Weiss

"Go on Rommel, get it," the group shouts, as the dog thrashes around in the rubbish. Moments later, following several squeaks, Rommel, blood dripping from his mouth, appears with the rat, and the hunters cheer.

The rat catchers pick up the carcasses by their tails and deposit them in a single-strap fabric bag. Its contents will be emptied and counted at the end of the night.

Jason Rivera, a member of the rat-catching group, and his dog attempt to catch a rodent in New York City on May 14, 2021
Jason Rivera, a member of the rat-catching group, and his dog attempt to catch a rodent in New York City on May 14, 2021 AFP / Angela Weiss

"The newer members share carrying the bag," said 28-year-old Sophia Pierce. "It's heavy -- do you want to feel it?"

Pierce, a dog groomer who joined the hunts with her wirehaired dachshund Lita a year ago, is unperturbed by the slaughter.

Alex Middleton places a dead rat into a bag during a hunt on May 14, 2021 in New York City
Alex Middleton places a dead rat into a bag during a hunt on May 14, 2021 in New York City AFP / Angela Weiss

"You just kind of get used to it. I think the people that just kind of walk up to it get more squeamish than we do," she said.

Reynolds, a dog-show judge, was in a park in New Jersey in the 1990s when his pooches started killing rats during a show there. The park attendant asked if they would come back to help, and R.A.T.S. was born.

Richard Reynolds of the Ryder's Alley Trencher-fed Society (R.A.T.S.) takes his dog out of a crate in lower Manhattan on May 14, 2021
Richard Reynolds of the Ryder's Alley Trencher-fed Society (R.A.T.S.) takes his dog out of a crate in lower Manhattan on May 14, 2021 AFP / Angela Weiss

R.A.T.S. answers calls and Facebook messages from rat-troubled residents who are usually most grateful for the group's swift and effective response.

The city government doesn't recommend the practice, citing a risk of dogs catching a serious disease known as leptospirosis. But city officials don't stop the group, because the catchers are not violating its health code.

Late one Friday night, eight dog enthusiasts and their pet pooches prowl several dark alleys in New York with one mission: to hunt and kill as many rats as possible
Representative Image AFPTV / Eleonore SENS

"The occasional beer can has been thrown at us for making too much noise, but we've got a warm welcome most places we go," said Reynolds.

Kayla Callender said she was "hyped" earlier this month when she saw the hunters in her Manhattan neighborhood near the Williamsburg bridge.

"They make a big difference, for sure. I appreciate it," she told AFP.

Not everyone feels the same.

Animal rights group PETA's senior director Stephanie Bell described the hunts as "archaic, depraved and illegal."

But for Reynolds, death-by-terrier is no crueler than by rat poison or sticky traps.

Michael Parsons, a rat expert at Fordham University, likens the hunts to putting "a Band-Aid on cancer." Reducing food waste and refuse is more effective for controlling the rat population, he said.

But while saying that the group doesn't make a "heavy impression" on New York's rodent population, he added that it does "contribute something to the community."

The group sends DNA samples to universities conducting research and provides frozen rats for falcons to eat at a nearby avian rehabilitation center.

The volunteers say their enjoyment comes from seeing their dogs have fun developing predatory skills.

"We do rat control but that's not really why we're here," said Reynolds. "We're here for the dogs, to work the dogs."

"It's a whole different world, a whole different way of meeting people. We work together, and the dogs are phenomenal together," she said.

After three hours of stalking, Greg Conception, 54, lines up the night's haul on the ground. He counts 26 in total.

"Usually we get about 40. This is a little light. We're obviously coming here too often," he said.