Why do mixed breed dogs tend to have less health problems?
Hybrid vigour may also apply in comparison to breeds that have been inbred. This happens when populations are isolated or small and/or become fashionable. Sadly, fashionable breeds and crossbreeds go through a sudden population growth and are exploited by people who do not look at potential genetic issues when selecting parents. The dogs are also less likely to be carefully selected as a suitable breed by the owners.
