Photo Courtesy of Phillips, R. W., “Figure 2. - Four rams that were produced or used in the multinipple flock: D. two rams of 1/2 Suffolk, 1/4 Bell multinipple, 1/8 Southdown, and 1/8 Rambouillet blood.” on The Genetics, Physiology, and Economic Importance of the Multinipple Trait in Sheep, 1945