Avian flu — watch raw milk/meat
Vets warn that HPAI H5N1 can jump from wild birds to farm animals through contaminated feed and water, and there’s a potential human risk from raw meat or raw milk — so caution matters around unpasteurized products during outbreaks. (dvm360.com)
Bird flu is not just a chicken problem anymore. Since March 2024, the United States has been dealing with highly pathogenic avian influenza H5N1 in dairy cows, which means a virus that usually moves with wild birds has found a way into milking barns. (fda.gov) The basic route is simple: wild birds shed virus in droppings and saliva, and farm animals can pick it up when feed bunks, water troughs, or bedding get contaminated. Veterinarian Deborah Thomson said that bird-to-farm spread through contaminated feed and water is one of the public risks people need explained clearly. (dvm360.com) Pasteurization is just a heat step for milk, like running water through a kill switch before it reaches your glass. The Centers for Disease Control and Prevention says pasteurization kills harmful germs in milk, and pasteurized milk remains safe to drink during the dairy-cow outbreak. (cdc.gov) Raw milk is different because it skips that heat step. National Institutes of Health researchers reported that H5N1 stayed infectious in refrigerated raw milk for at least five weeks in lab testing, and mice that drank contaminated raw milk got sick. (nih.gov) That is why health agencies keep drawing a bright line between pasteurized and unpasteurized dairy. The Food and Drug Administration said its testing found no infectious virus in pasteurized retail milk products even when fragments of viral genetic material showed up in some samples. (asm.org) Meat follows the same logic: heat lowers risk, raw products keep it. The Food and Drug Administration says heat treatments work for inactivating H5N1 in meat, milk, and egg products, and it tells consumers to follow United States Department of Agriculture cooking guidance for raw meat. (fda.gov) Cats have become one of the clearest warning signs because they get very sick from this virus after eating the wrong thing. The Centers for Disease Control and Prevention lists raw milk, raw dairy, undercooked meat from infected animals, and raw pet food as animal risk factors for H5N1 exposure. (cdc.gov) Researchers are still sorting out exactly how much food risk exists for people, but the lab evidence is enough to explain the caution. A 2025 Nature study found infectious H5N1 could persist through raw-milk cheese making under some acidity conditions, while ferrets got infected from contaminated raw milk in the same study. (nature.com) So the practical rule during an outbreak is boring and effective: choose pasteurized dairy, cook meat thoroughly, and do not give pets raw milk or raw meat. That advice is now coming not just from doctors and food regulators, but from veterinarians who are watching the animal side of the outbreak up close. (cdc.gov) (dvm360.com)
