As to Purina, I can only say read their ingredient lists.
Providing products for ‘every price point’ isn’t comparable with providing ‘quality protein sources’ ‘suitable’ to the digestive tracts of canines or felines in my experience.
I’ve had several dogs that were on ‘good’ pro-plan etc. that I switched to my feeding on purchase and the difference was very noticeable in a month or less.
Some dogs react to the high carb levels in non-animal protein feeds by becoming prone to irritable digestive systems, higher incidence of infections, and acting like they’ve taken crack.
There is a (granted, old) study out there that puts an ideal protein/fat ratio at 30% protein / 20% fat for best performance of breeding dogs and longer lives.
Very few of the Purina foods come close, many being low 20’s / low teens. for their ratios.
If you can find a higher protein food to feed that is not soy, corn gluten and pea based I think you are better off.
Skin problems? Pancreatitis? irritable bowel? Look to your feed.
I used to feed my cats Purina dry kitten chow all their lives and they lived to late teens/ early twenties - back in the 1970’s.
I tried that recently with some adult barn cats and they basically fell apart.
First ingredient is now corn. Sorry, that isn’t CAT food.
-I have sight hounds. Maybe they are higher needs.
But the cats are whatever shows up or was dumped.
