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Six Idaho Dairy Farms Have the Avian Flu. Here’s What You Need to Know

By Monica Esquivel

The Idaho State Department of Agriculture confirmed on Friday avian flu had been detected in a dairy operation for the first time in Minidoka County.

Last week, two farms in Jerome County also tested positive. The first three cases were detected in early April in Cassia County after a farm there received cows from an affected dairy in Texas.

State Veterinarian Dr. Scott Leibsle said about 10 to 20% of cows in affected facilities have tested positive and the economic impact to farmers has been significant.

“What you're seeing is, is a drop in milk production and a drop in feed intake for about that period of time. And then once the symptoms resolve and once the cattle recover, for the most part they're able to return to production,” Dr. Leibsle said.

He said while a large number of cattle have gotten sick, few cases have been fatal and most recover in 10 to 15 days. Poultry cases, however, are lethal and present a greater economic loss.

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Meet Alfonso Agulair: Zoetis Caregiver Award Winner and Herdsman at Tosh Farms

Video: Meet Alfonso Agulair: Zoetis Caregiver Award Winner and Herdsman at Tosh Farms


At World Pork Expo 2026, Swine Web caught up with Alfonso Agulair, a herdsman with Tosh Farms and one of this year's Zoetis Caregiver Award winners.

Known for his genuine care and dedication, Aguilar helps build a strong team culture while encouraging those around him to continually improve. During this interview, he discusses his journey into the swine industry, the importance of animal care, and what motivates him each day.

Before finding his home in pork production, Aguilar worked in construction. Today, he takes pride in helping provide safe, high-quality food while caring for animals and supporting his team.