Small Wisconsin dairy hopes to milk new trend: A1-free

East of Athens, in Marathon County, Joseph Zaiger's herd of about 40 cows produces a type of milk that could shake up the dairy industry.  It's like conventional milk but doesn't have a beta-casein protein that some studies have said makes milk less digestible, almost intolerable, for a large number of people. That is different from the condition known as lactose intolerance, which Zaiger's milk doesn't help.  The technical term is "A1 beta-casein free," meaning the milk from Zaiger's Clover Meadows farm lacks that particular protein found in most milk.  This isn't genetic modification; rather it's a process of breeding cows with the desired trait or finding them in a regular herd.