Thats exactly what I believe! My Cavalier, Louis has chronic gastritis and IBS. By feeding a raw diet, working with a holistic/integrative vet and being proactive about BOTH dogs health, I have two happy healthy pups. I am very focused on maintaining diet and health standard for them because it is SO effective in maintaining health!
I do the same thing for myself, I have a chronic immune disease and diet and lifestyle has far more impact on my health and how often I get sick then any medication.
Louis started showing some signs of thyroid disease and one of his levels was at the low end of normal and my vet put him on Chinese Herbs that made his levels get normal again! By maintaining and treating slightly high or low functioning systems, I hope it will keep them healthier for the long haul.
My dog's holistic lifestyle inspired my own changes and together, we three are healthy as larks!
