Yes, that is pretty much where I was going with my posts...
I have seen this first hand with my own old dog, and I know for a fact that the raw food did extend her life by a couple of years.
Considering so many of these dogs do not live to see their 2nd birthday, having one get to 12 or 13 yrs means one should try to improve their lives and good food is the best thing for any dog.
Raw feeding is the best but even supplementing with raw will help. And the oils will benefit any diet.
Basically (and this goes for our own food too) eating foods that are fresh is a huge improvement over foods full of chemicals, additives, and highly processed. I find I go into a grocery store and there is maybe only 5% of their foods that I would eat myself, i.e. fresh produce and fresh meats, etc.
No matter how "good" the kibble is, it is still a processed food and raw is a far more natural food for any dog. Easier to digest, and they get more nutrition from it.
Sure it costs more and takes more time but if you want to feed your dog the best, raw is the best...