TONY Yurgaitis and George Malkemus, who were partners with brilliant Spanish-born, British shoe designer Manolo Blahnik in his high-heel empire, have a cottage industry up in the tony Litchfield hills of Connecticut. Malkemus and Yurgaitis, who’ve pumped millions of bucks from their shoe business into their Arethusa Dairy Farm, are selling milk “like it used to taste” from their own herd of 400 contented cows. The Arethusa all-natural milk debuts today at locations around Connecticut.