Editor’s note: This article is the second in a series profiling sources for an in-depth feature about the Chinese dairy industry, appearing in print later this summer. Walter Chen, Ph.D., spends half of his professional life in his native China and the other half at home with his family in California.

Editor’s note: This article is the first in a series profiling sources for an in-depth feature about the Chinese dairy industry, appearing in print later this summer. Calvin Willis, Ph.D., has made his home in Southern California for the past 35 years. Widely respected throughout the southwestern U.S. as a consulting dairy nutritionist, he also works internationally.