It really is sad that there seems to be no such thing as a "Pet Nutritionist'" like there are for humans. But I can tell you this: I work with a Nutrition Program in our health department. We have nutritionists that do counseling, and we help to supply foods to low income families. We have contracts with the foods that are supplied. Only those approved by nutritionists make the cut. Well, some formula companies go around to our pediatricians and try and convince them that their product is the only good, one, all other products are inferior, etc. Plus, they give them free samples, they buy them lunch, etc. Like the vets, the doctors don't really have time--or maybe take the time--to explore the nutrition facts and will tell their clients that we are supplying an inferior product.
So, it's not just the vets that do this, but human doctors as well. Basically, we all have to educate ourselves. Even that long document that we read when we first get on this site seems to push DM cat food, but it has more plant-based carbs than then cat food I have now switched to.
But this is why medicine is considered an "art" rather than a "science".
