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

DAILY MEMO: Over 20 Kidnapped by ICE and CBP, Including Another U.S. Citizen, Amid Escalating Southern California Raids

More than 30 people were confirmed to have been detained in the last couple of days, including 3 U.S. citizens.

December 4, 2025

Border Patrol Detains Three at La Puente Chilaquiles Stand Before Seizing Its Cash Box

A screaming woman in an apron was seen running from the stand into the safety of a nearby firetruck, while the stand's other employees weren't so lucky.

Daily Memo: Feds Detain U.S. Citizens and Take Street Vendor’s Cash Box

Federal immigration raids are escalating in intensity, with more people being profiled and taken without due process.

L.A. City Council Rejects Proposal To Limit LAPD’s Use of Tear Gas and ’40mm Foam Launchers’

Prior to June 8, the LAPD had not used tear gas in crowd-control settings in almost 50 years, an LAPD spokesperson told L.A. TACO.

December 3, 2025

Update: Border Patrol Agents Raid Huntington Park Home Depot, As Fleeing Man Is Struck By Vehicle

“I denounce the Trump Domestic Terrorism Campaign that continues to target law-abiding residents in Huntington Park and across the nation,” said Huntington Park Mayor Arturo Flores. “I have faith that those who choose to violate human rights and constitutional rights will be held accountable for their crimes. Not to mince words . . . FUCK TRUMP and FUCK ICE.”

December 3, 2025

Daily Memo: Border Patrol Is Back, Targeting Southeast Los Angeles and Ripping Parents From Their Children

Border Patrol Is Back after their week-long hiatus, targeting Southeast Los Angeles and other areas, ripping parents from children, chasing workers and almost killing one, arresting a U.S. citizen, and targeting street vendors again.

See all posts