The article explains that breeding values for terminal-type sheep breeds such as Poll Dorsets, White Suffolks, and Dorpers were analyzed together, allowing comparisons within these breeds. However, these breeding values could not be compared across different breed categories, such as composite maternals, Border Leicesters, Corriedales, or shedding breeds derived from composite maternals.

This limitation means that while breeders can assess and compare genetic merit within specific terminal breeds, cross-category comparisons between terminal and maternal or shedding breeds are not feasible using the same breeding value analysis.