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

Director of Pasadena Community Job Center Speaks About Arrest by Pasadena Police After Observing Federal Immigration Activity

“They didn’t stop the ICE agent, but they stopped me,” said Jose Madera, who followed a vehicle driven wrecklessly by ICE agents, who continue to roam freely nationwide, even after killing 37-year-old Renee Nicole Good in Minneapolis earlier today.

L.A.’s Young Magicians Are Blowing Minds at Clubs, Pop Video Sets, and Taco Stands

Today's budding magicians are trading college and 9 to 5s to work with Chappell Roan, raise money for cancer patients, and perform at Magic Castle, marking a comeback for magic tricks in 2026.

January 7, 2026

DAILY MEMO: Border Patrol Returns On Dia De Los Reyes, Taking at Least Eight in Orange County and Injure Elderly Man

In another incident, a vendor in Fountain Valley was released after being questioned and detained, but not before CBP called for help from paramedics to use bolt cutters to remove the handcuffs used on the vendor.

January 6, 2026

DAILY MEMO: Masked and Unmasked Agents Kidnap at Least Eight Around Southern California In First Weekend of 2026

During the first weekend of the year, agents targeted areas nearby a Dollar Tree, PetCo, and more common errand hotspots—even a Wienerschnitzel.

January 6, 2026

Nine Places to Get to Know Venezuelan Food In L.A.

These are L.A.'s nine best places for getting to know Venezuelan cooking, from its beloved arepas, tequeños, and cachapas, to its national dish of pabellón criollo.

The Dark Origin of Rosca de Reyes, Plus the 10 Best In L.A.

Eating a rosca de reyes is a way to beat the post-holiday blues. Here are where to find the best ones in L.A. and plus, the macabre origin of the religious holiday that involves murdering infants.

January 6, 2026
See all posts