The more ‘bred’ a dog is the less survivable it becomes
Dog breeds are a human invention. Eventually they will breed out to look more and more like wolves as they bred with wolves (because they are a subspecies of wolves). In fact the more ‘bred’ a dog is the less survivable it becomes. Think of the contemporary pug with their squished faces, or this: http://blog.vetdepot.com/top-10-dog-breeds-with-the-most-health-issues