According to USDA, May Milk production was up on the month but down slightly on the year, but was down four-tenths of a percent from last year to 19 billion pounds with production per cow up 12 pounds. The herd size was down 89,000 milking cows from last May but up 5,000 from the prior month. Michigan continues to have the most productive cows in the nation. Virginia and Illinois had the largest decrease in milk production; Texas and Colorado had the largest increase.