H5N1 risk in companion animals is becoming a clinic issue

CURRENT BRIEF VERSION: Companion animals, especially cats, remain on the H5N1 front line as U.S. agencies and veterinary groups refine guidance around exposure risks, testing, and infection control. Recent federal updates have sharpened the message for pet parents and veterinarians alike: cats can become severely ill after exposure to infected birds, dairy cattle environments, raw milk, or raw poultry-based pet foods, while dogs appear less susceptible and typically develop milder disease. CDC guidance now specifically advises veterinarians to consider H5N1 testing in animals with compatible neurologic or respiratory signs plus relevant exposure history, and USDA continues to track mammalian detections, including domestic cats. AVMA reporting has added important context, noting that USDA documented nearly 70 domestic cat infections this year and about 200 U.S. cat cases since late 2021, with risk rising again alongside bird migration patterns. (cdc.gov)

Why it matters: For veterinary professionals, H5N1 in companion animals is no longer just a wildlife or poultry story. It has become a practical small-animal medicine, infection control, and client communication issue, particularly in cats with acute neurologic or respiratory illness. CDC recommends PPE for veterinary teams evaluating suspected cases, isolation of infected animals, and coordination with state public health veterinarians or animal health officials for testing. That matters not only for patient care, but also for protecting clinic staff, guiding One Health investigations, and helping pet parents understand why raw diets, raw milk, and outdoor exposure may now carry different risk conversations than they did before the dairy cattle outbreak. AVMA’s Veterinary Vertex also highlighted a practical point for client counseling: contaminated frozen raw diets may remain risky for long periods, with one implicated product carrying a sell-by date into 2026. (cdc.gov)

What to watch: Expect continued updates on surveillance, raw pet food oversight, and case definitions as agencies learn more about how often companion animals, especially cats, are being exposed and whether infections are being missed. Seasonal changes in wild bird activity may continue to influence spillover risk, and raw-food investigations are likely to remain part of the picture. (aphis.usda.gov)