Arizona dairy farmers preserve milk

A hundred cows at the Caballero dairy munch alfalfa under the spacious barn while fans and misters keep them cool during a 79-degree spring day.

The cool digs are not just about making cows feel comfortable, especially when temperatures hit 115 or more in the summer, said dairy owner Craig Caballero. New research indicates that ambient temperature affects milk production, and for Arizona farmers that means money.

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