Mysterious Deadly Respiratory Illness Strikes Dogs in Multiple States

Kristen Harrison-Oneal

NEWARK, NJ – Veterinary laboratories across Oregon, Colorado, and New Hampshire are currently investigating a sudden outbreak of a severe respiratory illness in dogs. This illness, characterized by symptoms such as coughing, sneezing, nasal or eye discharge, and lethargy, has led to cases of pneumonia that are unresponsive to antibiotics.

New Jersey and New York dog owners are cautioned to be alert for signs and symptoms.

Since mid-August, the Oregon Department of Agriculture has reported over 200 instances of this disease. The rapid progression of the illness, in some cases within 24 to 36 hours, has raised concerns among pet owners and veterinarians alike. State veterinarians have been advised to promptly report any cases, and pet owners are urged to seek veterinary care if their dogs exhibit symptoms.


No cases have been reported in New York or New Jersey at this time, but dog owners are urged to pay close attention to their’ pets’ health over the coming days and weeks.

The exact cause of the illness remains unknown. Efforts to identify the source are ongoing, with collaboration between state researchers, the Oregon Department of Agriculture, and the U.S. Department of Agriculture’s National Veterinary Services Laboratory.

Dogs are dying from the disease, but how many is unknown at this time.

Kurt Williams, director of the Oregon Veterinary Diagnostic Laboratory at Oregon State University, confirmed fatalities among dogs but noted the difficulty in determining specific numbers due to the lack of a definitive diagnostic test. The veterinary community emphasizes the importance of vigilance and immediate medical attention for dogs showing signs of respiratory distress.

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