I do not understand the sense of comparison between HD and ED. Those Problems are governed by a different gene control, HD a polygenism, ED a dominant gene. Different is the criterion for the choice of stallion for the two problems. The value of a stallion HD C depends on the outcome of the entire litter, the descendants, and halfsiblings and ancestor. HD C stallion with his brother is HD D, his halfsibilings is HD E can not be viewed in the same way that HD C stallion from a litter where all the brothers are HD A, whose parents come from good litters. While all dogs with ED 1 to be considered in the same way.
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