Filip Zarzecki
Filip Zarzecki voted up Rooster Cogburn's answer

Angela is right. According to guidedogsof america

Breeds and Matching Process. Breeds Used: We use 70% Labrador Retrievers, 15% Golden Retrievers, and 15% German Shepherds. TheLabrador Retrievers make up the majority of our dogs because we have found them to be the most successful breed used for guide dogs