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.

The billboard campaign encourages farmers who might have been affected by the bird flu to transition to "other plant-based source of livelihood."

Gov. Gavin Newsom’s declaration has riled up concern, particularly in other top dairy-producing states, such as Wisconsin and Pennsylvania.

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.

California declared a state of emergency this week over the spread of bird flu in the state as the virus continues to be detected among the state’s cattle herds. California Gov. Gavin Newsom

The County of San Diego is warning the public to not eat or drink raw milk products or give them to their pets after Gov. Gavin Newsom declared a State of Emergency due to a rise in H5N1, or bird flu,