The FDA has said that raw milk is full of viral and bacterial particles from infected udder tissues, cow manure, milking equipment and other sources — and it's not the kind that benefits gut health.

Even so, experts say bacteria can still contaminate milk — even when procured from a sparkling-clean udder.

He said he monitors each cow at his farms with a device that sits in a cow’s udder and sends real-time information about the animal’s body temperature, milk acidity, etc.

“Cow udders have receptors in common with birds, and they also have receptors in common with humans, where these viruses bind,” Karan said.

“Their faces are approximately 5 inches away from the milk and the udders all day long,” she said.