Despite the commonly held notion that mixed - breed dogs display fewer inherited
disorders than purebred dogs [2 — 5], actual data suggests a more nuanced interpretation.
Not exact matches
The first detailed genetic comparison of
purebred domestic
dogs promises to rewrite the textbooks with new information about breed classification and insights that may improve canine health by boosting understanding of the more
than 350 inherited
disorders, including cancer, heart disease, epilepsy, blindness and deafness, which affect
dogs.
First know that, as a result of their breeding,
purebred dogs very often have genetic
disorders and medical issue predispositions, certainly no less often
than shelter
dogs.
Only one
disorder — cranial cruciate ligament rupture — was more likely in mixed - breed
dogs than purebred dogs.
Many people suggest that
purebred dogs are more prone to genetic
disorders than mixed breed
dogs.
Although
purebred dogs do have a higher incidence of some inherited
disorders, they are no more likely to develop many serious health conditions, such as cancer, heart
disorders and endocrine
disorders,
than mixed breed
dogs.
It is known that many individual breeds show a higher
than expected frequency of some
disorders [7 — 10] suggesting that the higher prevalence of those
disorders may be restricted to discrete subsets of the
purebred dog population.
Although it is commonly assumed that
purebred dogs are more prone to inherited (genetic)
disorders than mixed - breed
dogs, the data suggest that this distinction is not quite so categorical.
The ability to record health data for defined breeds has simultaneously permitted genetic dissection of particular
disorders and bolstered the implicit assumption that
purebred dogs are more prone to inherited
disorders than mixed - breed
dogs [2 — 5].