No, this is important. There are a lot of people who will tell you that 'selective breeding doesn't work and always backfires, because look how unhealthy some d

No, this is important. There are a lot of people who will tell you that 'selective breeding doesn't work and always backfires, because look how unhealthy some dog breeds are'. This study is part of the evidence-base showing that that is wrong: those dog breeds are unhealthy because they are incredibly inbred with effective population sizes so small you may be able to count them on two hands. The bulldogs will always be unhealthy to some degree because those faces are just not a good idea, but even there some bulldog breeds are far sicklier than others, and it's due to the inbreeding, and when you know that, you know how to improve them. This is important for stuff like agricultural breeding: the problems aren't inevitable, and are caused by specific mistakes, like starting with too few individuals, closing the studbook prematurely, and not outcrossing.