Federal authorities say it is likely being carried from farm to farm on objects like farm equipment or clothing that has touched a sick cow.

California officials have declared a state of emergency over the spread of bird flu, which is tearing through dairy cows in that state and causing sporadic illnesses in people in the U.S.

Northwest Naturals is recalling a line of its pet food after authorities Oregon linked the death of a cat to a batch contaminated with bird flu.

The California Department of Food and Agriculture has issued a statewide recall of raw milk produced and packaged by Valley Milk Simply Bottled after H5N1 bird flu virus was found in samples from a bulk tank at the company’s dairy farm.

A backyard flock in Vermont was sickened with H5N1, agricultural officials said on Thursday, following other reports of bird flu-related animal deaths this month beyond commercial farms and wildlife.

A pet food company recalled a batch of one of its products after the Oregon Department of Agriculture blamed the product on the death of a house cat. The company told consumers in 12 states to throw out the product.

Health officials were warning residents Wednesday not to feed their pets raw food following a voluntary recall of Northwest Naturals Brand 2lb Feline Turkey Recipe Raw & Frozen Pet Food due to detection of H5 bird flu virus in product samples.

Northwest Naturals issued a voluntary recall for a batch of pet food after a cat died of bird flu in Oregon, officials said. Testing done by the U.S. Department of Agriculture's National Veterinary Services Laboratories and the Oregon Veterinary Diagnostic Laboratory confirmed an indoor cat in Oregon's Washington County contracted bird flu and died after eating the pet food.