Nutrients vs Ingredients
Why the Right Senior Diet Matters More Than Ever
As dogs age, every calorie counts. Senior diets aren’t just about meeting minimum nutrient requirements—they should be about providing optimal, bioavailable nutrition that supports muscle mass, mobility, cognition, and overall vitality.
While many senior formulas in the RX kibble category hit the numbers on paper, they often do so using highly processed meals, fillers, and a long list of synthetics. At Medicus, our Senior Diet is built from clean, functional whole foods—because at this stage of life, quality and digestibility matter as much as quantity.
Compare Our Ingredients
Medicus Senior Diet
Chicken, Chicken Neck, Chicken Liver, Flax, Barley Flour, Krill, Blueberries, Broccoli, Chicken Broth, Carrots, Pumpkin, Beets, Spinach, Tomato, Avocado, Cranberries, Spirulina, Sweet Potato, Barley Grass, Pomegranates, Sea Salt, Nutritional Yeast, Kelp, Glucosamine, FOS (Fructooligosaccharides) Mixed Tocopherols, & Guava
Whole Grain Wheat, Whole Grain Corn, Flaxseed, Chicken Meal, Corn Gluten Meal, Chicken Fat, Chicken Liver Flavor, Fish Oil, Powdered Cellulose, Lactic Acid, Pork Liver Flavor, Potassium Chloride, L‑Lysine, Calcium Carbonate, Choline Chloride, Iodized Salt, vitamins (Vitamin E Supplement, L‑Ascorbyl‑2‑Polyphosphate as Vitamin C source, Niacin Supplement, Thiamine Mononitrate, Vitamin A Supplement, Calcium Pantothenate, Riboflavin Supplement, Biotin, Vitamin B₁₂ Supplement, Pyridoxine Hydrochloride, Folic Acid, Vitamin D₃ Supplement), L‑Threonine, minerals (Ferrous Sulfate, Zinc Oxide, Copper Sulfate, Manganous Oxide, Calcium Iodate, Sodium Selenite), Taurine, L‑Tryptophan, Glucosamine Hydrochloride, Mixed Tocopherols (for freshness), L‑Carnitine, Natural Flavors, Chondroitin Sulfate, Beta‑Carotene
Chicken, Chicken Meal, Corn Protein Meal, Brewers Rice, Ground Yellow Corn, Ground Wheat, Vegetable Oil (source of Medium‑Chain Triglycerides), Corn Germ Meal, Barley, Glycerin, Fish Oil, Natural Flavor, Dried Egg Product, L‑Arginine, Wheat Bran, Mono- and Dicalcium Phosphate, Fish Meal, Salt, Potassium Chloride, Calcium Carbonate, L‑Lysine Monohydrochloride, Vitamin E Supplement, Choline Chloride, L‑ascorbyl‑2‑polyphosphate (Vitamin C), Zinc Sulfate, Ferrous Sulfate, Niacin (Vitamin B₃), Manganese Sulfate, Vitamin A Supplement, Thiamine Mononitrate (Vitamin B₁), Soybean Oil, Calcium Pantothenate (Vitamin B₅), Vitamin B₁₂ Supplement, Copper Sulfate, Riboflavin Supplement (Vitamin B₂), Pyridoxine Hydrochloride (Vitamin B₆), Garlic Oil, Folic Acid (Vitamin B₉), Menadione Sodium Bisulfite Complex (Vitamin K), Calcium Iodate, Biotin (Vitamin B₇), Vitamin D₃ Supplement, Sodium Selenite
Chicken by‑product meal, brewers rice, wheat, corn protein meal, chicken fat, corn, brown rice, natural flavors, dried plain beet pulp, wheat gluten, fish oil, pea fiber, dried tomato pomace, vegetable oil, sodium aluminosilicate, potassium chloride, powdered psyllium seed husk, calcium carbonate, salt, vitamins (DL‑alpha tocopherol acetate as vitamin E, L‑ascorbyl‑2‑polyphosphate as vitamin C, niacin, D‑calcium pantothenate, biotin, pyridoxine hydrochloride [B6], riboflavin [B2], thiamine mononitrate [B1], vitamin A acetate, vitamin B12, folic acid, vitamin D3), plus fructooligosaccharides, choline chloride, rosemary extract; preserved with mixed tocopherols and citric acid; L‑tryptophan; taurine; glucosamine hydrochloride; trace minerals (zinc proteinate, zinc oxide, manganese proteinate, ferrous sulfate, manganous oxide, copper sulfate, sodium selenite, calcium iodate, copper proteinate); GLA‑rich safflower oil; L‑carnitine; marigold extract (Tagetes erecta L.); green tea extract; chondroitin sulfate
Proof in the Numbers

When it comes to senior nutrition, it’s not just about meeting the minimum requirements—it’s about providing the right nutrients in the right proportions to keep older dogs strong, mobile, and mentally sharp.
The Medicus Senior Diet delivers optimal protein for maintaining lean muscle, healthy fats for joint and brain function, and carefully balanced omega fatty acids to help manage inflammation. Compared to leading prescription senior diets, Medicus offers a nutrient profile designed for digestibility, bioavailability, and true whole-food support—without relying on synthetic-heavy formulations or filler ingredients.
