Wisconsin's dairy cows are working twice as hard as their national counterparts.
The state's milk production rose 4.8 percent last month from the previous January.
That's twice the increase from the 23 major dairy-producing states.
About 1.25 million cows made just over 2 billion pounds of milk in the Badger State last month.
The state's herd grew by about 5,000 from the previous year and each cow made about 10 pounds more on average.
California, the nation's top milk producer, had only three-fourths of the increase Wisconsin had on a percentage basis.
The government also said the Badger State's milk production grew 2.9 percent for all of 2007. That's higher than the national increase of 2.1.