Watch: Researchers Say Happiness Turns Dairy Cows Into Cash Cows

SAUK CITY, Wis. (AP) -- Dairy farmers, take note: The key to turning your dairy cow into a cash cow is udder happiness.Give her a bigger stall, increase air circulation and provide some shelter to prevent overheating.That's according to a University of Wisconsin initiative that focuses on making dairy cows happier so they provide more milk."I think it's really important that we give them the spa treatment," said Nigel Cook, who has directed the Dairyland Initiative at the University of Wisconsin-Madison's School of Veterinary Medicine since 2010.  Continue reading...