I wouldn't feed this food. Vets do not have the knowledge of nutrition that we would hope. There are many better foods out there with many threads here on the forum to get good information. I feed raw, but if I were to feed a kibble to my pup I would go with Wellness super5mix large breed puppy
which can be found most everywhere(not grocery stores of course). Or I would go with Orjen, but that can be harder to find.
The ingredients of the Iams proactive puppy:
Chicken, Chicken By-Product Meal, Corn Meal, Ground Whole Grain Sorghum, Corn Grits, Brewers Rice, Chicken Flavor, Dried Beet Pulp, Fish Meal, Fish Oil (preserved with mixed Tocopherols, a source of Vitamin E), Dried Egg Product, Chicken Fat (preserved with mixed Tocopherols, a source of Vitamin E)Brewers Dried Yeast, Potassium Chloride, Salt, Caramel, Choline Chloride, Calcium Carbonate, Fructooligosaccharides, Minerals (Ferrous Sulfate, Zinc Oxide, Manganese Sulfate, Copper Sulfate, Manganous Oxide, Potassium Iodide, Cobalt Carbonate), Vitamins (Vitamin E Supplement, Ascorbic Acid, Vitamin A Acetate, Calcium Pantothenate, Biotin, Thiamine Mononitrate (source of vitamin B1), Vitamin B12 Supplement, Niacin, Riboflavin Supplement (source of vitamin B2), Inositol, Pyridoxine Hydrochloride (source of vitamin B6), Vitamin D3 Supplement, Folic Acid), DL-Methionine, L-Lysine Monohydrochloride, Rosemary Extract.