MINNEAPOLIS--(BUSINESS WIRE)--The Dairy Queen® system, the international retail treat category leader and part of Berkshire Hathaway (NYSE: BRK.A and BRK.B), announces that it will have a presence in Europe for the first time in more than 20 years. Sparrow 4 Sp. Z.O.O., has signed a long-term multi-unit agreement to develop DQ Grill & Chill® restaurants and DQ® Treat stores in Poland. “This move is strategic. We are entering the Eastern European market at a time when Western brands are bein