Parasite resistance is an exceptionally important trait for those flocks that run sheep on pasture during the grazing season. In the northeast, our “window” of time for exposure to parasites is shorter than in the south, but it is intense nevertheless and requires close monitoring, adaptive management practices, and if unsuccessful may result in significant mortality of lambs. Many breeders believe genetically resistant stock is the best tool to combat parasitism. We have been selecting for parasite resistance for well over a decade. In the figure at left, we present the average counts of Strongylid eggs in our lambs over time. Unlike our previous figures, here it is desirable to be below the breed average. That is, to have a lower average count of worm eggs. Our efforts have been trending downward almost from the start, but not until we imported a significantly resistant ram for the 2013 lamb crop, did we finally drop below the breed average. With few exceptions, we have maintained that trend over time. We are confident that with the rams we have recently acquired, and the highly parasite resistant ewes we have retained, we will continue that trend.