Dairy industry experts say the virus entered California after local cows were shipped to another state and then returned to California.

However, there is urgent concern over dairy cows. In California’s Central Valley, the carcasses of dead cattle have been piling up, a phenomenon documented in videos taken by a local veterinarian. According to the CDC, there have been confirmed infections in more than 300 herds of cattle in the U.S. in 14 states since March.

Cows in California are dying at much higher rates from bird flu than in other affected states, industry and veterinary experts said, and some carcasses have been left rotting in the sun as rendering plants struggle to process all the dead animals.

Another five suspected cases of bird flu were reported today in California, where six cases have already been confirmed, according to the California Department of Public Health. The state, which is the country’s largest dairy supplier,

Slovakia has reported an outbreak of avian influenza on a poultry farm, the World Organisation for Animal Health (WOAH) said on Tuesday, as Europe faces a seasonal upturn in the deadly disease commonly known as bird flu.

Bird flu viruses are divided into two categories: low pathogenic avian influenza (LPAI) and highly pathogenic avian influenza (HPAI). H5N1 is an HPAI that causes severe illness an

A commercial broiler poultry farm just west of California's Springville, with a flock of 786,600 birds, has been confirmed to have cases of bird flu.

After an outbreak of bird flu in a commercial chicken flock in Cache County, weekly testing will now be required for all dairies in the county, in an attempt to curb the spread of the infectious disease.