Oosterhof Family For Joe Oosterhof and his wife Rita, dairy farming runs deep. Joe grew up milking cows with his father in south Dufferin County. And he never looked back In 1971, Joe and Rita purchased their own farm and have been there ever since. Currently the Oosterhofs and their son, Jamie, are milking 46 cows and growing corn, barley, hay, soybeans and canola on their 186 acres of farm land. Joe has been a member of Gay Lea Foods for over 24 years and continues to contribute greatly to the dairy community in Dufferin County and the province of Ontario.