Skip to Content

Ten Cases of Mysterious Respiratory Disease in Dogs Confirmed in L.A.

According to the Los Angeles County Department of Public Health, 10 cases of Atypical Canine Infection Respiratory Disease have been received from veterinarians in the county since Thursday.

Cute dog on operating table

photo: Karsten-Winegeart/Unsplash

A mysterious respiratory disease already detected in hundreds of dogs across the country has been reported in 10 canines in Los Angeles County, health officials said today, prompting an investigation into the origin of the illness and the extent to which it may have spread locally.

The unknown illness has been dubbed Atypical Canine Infection Respiratory Disease, and it has been detected in multiple states, including New Hampshire, Rhode Island and Massachusetts. Officials in Oregon have reported more than 200 cases, according to media reports in that state.

According to the Los Angeles County Department of Public Health, 10 cases of the illness have been received from veterinarians in the county since Thursday. The dogs were showing signs of illness, even though they tested negative for all normal respiratory ailments.

Symptoms include cough, nasal discharge, sneezing and lethargy. County health officials said owners of the dogs believed to have the new illness are being contacted in hopes of tracking down where the animals may have been infected. Health officials are also coordinating with federal and other state agencies to coordinate the investigation.

Cases of the new illness are being defined as occurring in animals that test negative for normal respiratory illnesses but also have at least one of three other indicators:

-Chronic respiratory infection lasting more than six weeks that does
not respond to antibiotics

-Chronic pneumonia that is resistant to antibiotics; or

-Acute pneumonia that quickly becomes severe and leads to severe
illness or death.

Owners who believe their pet may be infected should contact their veterinarian and isolate the animal at home for at least 28 days from the time symptoms developed. Owners should also clean and disinfect surfaces and animal equipment. Dogs should also be kept away from day care, boarding kennels, grooming facilities and dog parks.

If a dog becomes sick after being boarded, owners should quickly seek veterinary care for the animal and notify the boarding facility about the illness.

Reporting by City News Service, Inc.

Stay in touch

Sign up for our free newsletter

More from L.A. TACO

Three U.S. Citizens Detained by Federal Immigration Agents in Southern California Speak Out For the First Time

U.S. Senate report reveals new testimonies from detained victims of Border Patrol: "I couldn’t breathe. They pulled me up, and when I turned around, they told me that if I looked at their faces, they would slam me again,” Cardenas said.

December 13, 2025

How This Artist Is Turning L.A.’s Trash Into Art Draped With The U.S. Flag

I thought a lot about the ICE raids immensely,” says artist Acacia Marable. "And a lot about the unhoused people, ‘cause I mean, it's literally like this idea of this ugly thing that you don't want to be associated with your community or our country."

December 13, 2025

Daily Memo: ICE Prowls Around L.A. and San Diego, Kidnapping at Least Seven Individuals

ICE agents continue terrorizing southern California, kidnapping many including a gardener taken from his work truck.

Ten Damning Revelations in Congressional Probe Into U.S. Citizens Unlawfully Detained by Federal Immigration Agents

“At least you’ll have an exciting story to tell when you go back to school,” one federal agent told a detained 15-year-old child with special needs. The report includes three U.S. Citizens from the L.A. area, speaking out for the first time and a six-year-old child with autism kidnapped in Massachusetts.

December 12, 2025

L.A. TACO’s 2025 Holiday Gift Guide

Perfume for goths, elk burgers, ICE piñatas, graffiti books, and 18 other items that should get your gift-giving wheels turning.

December 12, 2025

Weekend Eats: Steak Au Poivre Ramen and a Holiday Market For Palestine

Plus a new modern Indian restaurant with pork vindaloo croquettes and a breakfast spot for chicken katsu and waffles.

December 12, 2025
See all posts