IAMS® ProActive Health™ Mature Adult Large Breed

IAMS Mature Adult Large Breed nurtures your dog’s bones and joints through specially formulated nutrition with natural sources of glucosamine blended with fat-burning L-carnitine to help keep him fit, active, and living large.
  • Strong Immune System Strong Immune System Enriched with antioxidants to help develop a strong immune system.
  • Healthy Joints Healthy Joints Formulated to nourish healthy joints.
  • Healthy Metabolism Healthy Metabolism Formulated with L-carnitine to help burn fat and maintain healthy metabolism.
  • Healthy Heart Healthy Heart Nourishes the heart with 7 essential nutrients.
3408 kcal/kg
343 kcal/cup
Chicken, Ground Whole Grain Barley, Ground Whole Grain Corn, Chicken By-Product Meal, Ground Whole Grain Sorghum, Chicken Meal, Dried Beet Pulp, Natural Flavor, Brewers Dried Yeast, Dried Egg Product, Potassium Chloride, Flaxseed, Caramel Color, Salt, Sodium Hexametaphosphate, Calcium Carbonate, Carrots, Choline Chloride, Tomatoes, Fructooligosaccharides, Green Peas, Spinach, L-Lysine Monohydrochloride, Minerals (Ferrous Sulfate, Zinc Oxide, Sodium Selenite, Manganese Sulfate, Copper Sulfate, Manganous Oxide, Potassium Iodide), Vitamin E Supplement, DL-Methionine, L-Tryptophan, Beta-Carotene, Dried Apple Pomace, Vitamins (Ascorbic Acid, Calcium Pantothenate, Vitamin A Supplement, 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), Dried Blueberry Pomace, L-Carnitine, Mixed Tocopherols, Rosemary Extract
Weight of Dog (lbs.) Maintenance-Feed Daily
50 lbs. 3 1/4 – 3 2/3 c
60 lbs. 3 2/3 – 4 1/4 c
70 lbs. 4 – 4 3/4 c
80 lbs. 4 1/2 – 5 1/4 c
100 lbs. 5 1/3 – 6 1/4 c
120 lbs. 6 1/4 – 7 c
140 lbs. 7 – 8 c

c = cups; 1 cup = 100 grams

These guideline amounts are a starting point and your dog may need more food depending upon age, activity, and temperament. In order to reach optimal body condition, you may need to adjust food intake. This represents the total recommended volume of food per day. You should divide the total recommended feeding amount by the number of times you feed your dog per day to get the actual portion size per feeding.

Large-breed puppies, reaching 51 to 90 lbs. at maturity, should transition to IAMS ProActive Health Large Breed formula at 12 months of age. Giant-breed puppies, over 90 lbs. at maturity, should transition to IAMS ProActive Health Large Breed formula at 24 months of age.

Remember to have clean, fresh water available for your dog at all times.

Because IAMS ProActive Health Mature Adult Large Breed dog food is complete and balanced for adult dogs, you do not need to add vitamin or mineral supplements.

When introducing IAMS dog food, gradually mix it with your dog's current food over the course of 4 days.

SAFE HANDLING TIPS FOR ANY PET FOODS AND TREATS: Please wash your hands before and after handling any pet food or treat. Wash pet food bowls with soap and hot water after each use.

Replace 1 1/2 cups (128 g) for each can of Iams Senior with Slow Cooked Chicken and Rice (375 g).

Crude Protein, minimum 26.00%
Crude Fat, minimum 10.50%
Crude Fat, maximum 13.00%
Crude Fiber, maximum 5.00%
Moisture, maximum 10.00%
Calcium, minimum 1.25%
Phosphorus, minimum 0.90%
Vitamin E, minimum 140 IU/kg
Beta-Carotene, minimum 10 mg/kg*
L-Carnitine, minimum 30 mg/kg*
Omega-6 Fatty Acids, minimum 1.​60%*
Glucosamine, ​minimum 350 mg/kg*
Chondroitin Sulfate, ​minimum 35 mg/kg*

*Not recognized as an essential nutrient by the AAFCO Dog Food Nutrient Profiles

ProActive Health™ Mature Adult Large Breed is rated 4.3 out of 5 by 70.
Rated 3 out of 5 by from So how many calories per cup? Why no mention of calories per up and just "recommended cups"?
Date published: 2018-06-15
Rated 5 out of 5 by from More Energy and Playful Our 7-1/2 year old Australian Red Heeler has been on Iams since we rescued her at age 1-1/2. We changed to the Mature formula about four months ago and the first thing we noticed was Maggie is initiating playtime with toys again, something she'd stopped doing about a year ago. She seems to by "younger" in her energy levels.
Date published: 2016-03-21
Rated 3 out of 5 by from SO SO I bought this for my dogs, but they were not overly excited about it.. They ate it , but did not particularly care for it any more than the less expensive foods.. Iams is very expensive to buy - even with a coupon'
Date published: 2016-03-01
Rated 4 out of 5 by from Great food, tough bag. I switched my finicky senior dog to Iams a year ago, he loves it. Then when I got my kitten, I started her on it and she loves it. It's a pricy food for me, but I want the best I can afford. But, I find the bags difficult to open, I have issues with my hands. I would love to see a pull string or tab. THAT is the only reason I didn't give it 5 stars. I would love to get some coupons to help alleviate my tight budget.
Date published: 2016-02-27
Rated 4 out of 5 by from Great Nutrition My dog loved this food and was very happy to switch. Great nutrients and helped skin and coat
Date published: 2016-02-13
Rated 4 out of 5 by from Good formula for my dog My dog enjoyed this food and he ate it pretty quickly. I like that it is formulated for his age and size. I have, however, seen him eat other foods with more interest. I would use it again if I had a discount.
Date published: 2016-02-11
Rated 5 out of 5 by from He loved it This is the only thing I will feed my dog. He is very health at 12 years old.
Date published: 2016-02-11
Rated 4 out of 5 by from Good for my 13 year old I got this product and my dog seemed to love it. Glad he got to try it before he passed on.
Date published: 2016-02-11
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