The greatest improvement, however, can be expected
in breeds with low population, high heritability, and strong
breed clubs concerned about genetic defects; likewise the greatest
decline in joint
quality can be expected
in breeds experiencing the fastest growth
in popularity and indiscriminate
breeding.
Due to this, the only breeders left
breeding blues were those that did not pay as close attention to the
quality in which they were producing thereby the general
quality of blues has
declined over the years.