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In the “dairy parlors” that commercial farms use to milk cows, floors are often cleaned using high-pressure water sprayers, which could aerosolize the virus, he notes.

This week, they began sending volunteers to milk cows, pick tomatoes and cucumbers and plant potatoes at abandoned farms in the south.

Mr. Mendoza, whose family in Peru owned a few milk cows, sheep and mules, first heard about the sheepherding opportunity from a friend.

Travolta’s character, Bud, at one point remarks that when he was born, his father sold a milk cow to pay the physician who delivered him.

She paid her way through college by raising and selling a herd of eight milk cows, yearlings and heifer calves.