How a growing enthusiasm for raw milk is clashing with avian flu fears

A growing bird flu epidemic has spread through American cattle and poultry, sparking harsh warnings from federal health and food safety regulators to avoid raw milk and eggs.

It’s all coming amid a surge in the number of people drinking raw, non-pasteurized milk, a trend that could lead to dangers not limited to bird flu.

Because it is not pasteurized like the milk normally sold in grocery stores, raw milk is not heat-treated to kill any potential pathogens.

Experts warn that without pasteurization...