I'd probably never get a big dog again unless I have a job for them to do.
She was an Australian shepherd / Great Pyrenees mix. A working dog, and for the first half of her life boy did we have to work her to get her happy. A mile a day is not enough for a big dog. Big dogs need regular activity, preferably throughout the day.
Failure to exercise a large dog properly leads to bad behavior, which is hard to correct because they _really want something to do_. So many people, not providing enough training nor enough job for their dog resort to using harnesses and other restraints when in public, and then when they have company over the dogs are reactive until they are put in the place where they can be out of the way.
Now, obviously this is anecdotal experience mixed with real world knowledge acquired through a dog trainer we have a long relationship with. But after all of this, I strongly feel most people with large dogs, especially in suburbs and cities, are doing those animals a disservice. Is your dog home alone for 8 hours a day? Woof…
Extending the life of an animal that is not performing the job it was literally bred to do is denying its nature. I'm not saying this to be convinced otherwise or that I'm 100% right, but now that I'm outside of the sphere of dog ownership I feel like I want to reflect in context of this otherwise incredible breakthrough.
Of course, keeping a dog alive longer with muscles and joints that have not been used properly throughout its life probably makes for a lucrative longterm pet care market opportunity…