Max Armstrong says it’s been about a year since the worst outbreak of avian influenza hit the U.S., and it continues to impact the consumer, via the cost of eggs. Flocks in South Dakota have been infected in the last few months. Nearly 4 million poultry have died since it started in the state. And officials don’t know why the outbreak is still happening. The outbreak has caused the deaths of nearly 58 million birds in 47 states. While the disease hasn’t impacted humans via infection, the Wall Street Journal confirmed the first known cases in grizzly bears.

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Max Armstrong's Farm Progress America is a daily look at key issues in agriculture. It is produced and presented by Max Armstrong, veteran farm broadcaster and host of This Week in Agribusiness.