Iams Healthy Aging Mature & Senior Large Breed with Real Chicken Dry Dog Food

By Iams
Rated 4.5027 out of 5 stars
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Iams Proactive Health Healthy Aging Large Breed Mature and Senior Formula with Real Chicken Dry Dog Food, 30-lb bag slide 1 of 10
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Iams Proactive Health Healthy Aging Large Breed Mature and Senior Formula with Real Chicken Dry Dog Food, 30-lb bag slide 1 of 10

$41.98Chewy Price
$39.88Autoship Price
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About This Item

  • This dog food is formulated to support the nutritional and wellness needs of your large-breed senior dog.
  • Features real farm-raised chicken as the first ingredient.
  • Formulated with key nutrients to support bone and joint health.
  • Contains antioxidants for immune system support.
  • Includes a wholesome blend of prebiotics and fibers to help promote a healthy digestive system.
Play Video: Learn More About Iams From Our Team of Experts
Learn More About Iams From Our Team of Experts

Vet-Trusted and Loved by Dogs

IAMS combines tailored nutrition with tasty real ingredients your dog will love. Choose from formulas targeted to specific age, size, special need and breed requirements and know that your pup will be getting everything he needs to be his best. Experts trust and recommend IAMS dry dog food for its complete and balanced nutrition, while dogs adore it for the delicious meaty flavor.

High Quality Animal Protein

Protein from real meat provides the building blocks for healthy muscles and the fuel your furry friend needs to thrive. Every IAMS dog food recipe features high-quality, natural animal protein from sources like chicken, beef, lamb and turkey that provide excellent nutrition and flavor for your carnivore.

100% Complete and Balanced

IAMS makes their dog food with 0% fillers and no artificial preservatives or flavors, so nothing comes between your dog and great nutrition. Each recipe contains all the nutrients your pup needs for a healthy diet, with a complete and balanced nutrient profile and ingredients specifically targeted to your dog’s size, age and breed needs.

Real, Wholesome Ingredients 

Real whole foods like farm-raised chicken, wholesome grains and antioxidant-rich veggies combine to provide the premium nutrition and taste your dog deserves. These natural sources provide important compounds like amino acids for healthy muscles, fiber and prebiotics for good digestion and omega-6 for a healthy skin and coat, plus a savory flavor that’ll keep him coming back for more.


IAMS is suitable for dogs of all ages and sizes – from nourishing growing puppies to giving seniors the nutrition they need to thrive.


Every wag-worthy recipe is specially formulated with key ingredients like omega-6 fatty acids to promote healthy skin and a glossy coat.


From urinary tract health formulas and more, IAMS provides dogs with nutrition as unique as they are to meet their specialized needs.

About IAMS

IAMS is driven by a philosophy of innovation and an emphasis on advanced pet nutrition. Through extensive research and a unique understanding of dietary requirements for dogs and cats, they've developed diets that help pets thrive. Their formulas meet the everyday needs of pets and their owners with options for every household. IAMS is a leader in pet nutrition that has provided 60 years of nutritional excellence with innovative products that help improve the health of pets worldwide.

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Top IngredientsChicken, Chicken By-Product Meal (source of Glucosamine and Chondroitin Sulfate), Ground Barley...Chicken, Chicken By-Product Meal, Ground Barley...Chicken, Chicken Meal, Whole Grain Brown Rice...Lamb, Chicken Meal, Brown Rice...Chicken Meal (Source of glucosamine and chondroitin sulfate), Brown Rice, Brewers Rice...
Special DietWith Grain, Low FatWith Grain, Low FatNo Corn No Wheat No Soy, With GrainWith GrainNo Corn No Wheat No Soy, Sensitive Digestion, With Grain
Health FeatureBrain Health, Dental & Breath Care, Muscle Care, Skin & Coat HealthDental & Breath Care, Brain Health, Skin & Coat HealthMuscle Care, Digestive Health, Immune Support
Breed SizeLarge Breeds, Giant BreedsSmall Breeds, Medium Breeds, Large Breeds, All BreedsSmall Breeds, Medium Breeds, Large Breeds, All BreedsSmall Breeds, Medium Breeds, Large Breeds, All BreedsSmall Breeds, Medium Breeds, Large Breeds, All Breeds
Food FlavorChicken, PoultryChicken, PoultryChicken, PoultryLamb, MeatChicken, Poultry, Fruits & Vegetables

Questions & Answers

13 Customer Questions

Is Iams made in the U.S.A.?
Answer by ChewyMay 07, 2018
This product is made in the United States.

What is the size of the kibble pieces?
Answer by ChewyJul 14, 2020
The kibble size for the Iams ProActive Health Mature Adult Large Breed Dry Dog Food is approximately 5.0-7.0 millimetres thick and 13.0-15.5 millimetres in diameter.

How many cups/servings are in this bag?
Answer by ChewyJun 16, 2018
The 30 pound bag contains about 120 cups of food.

how old is considered senior
Answer by ChewyOct 14, 2020
Small dogs are considered senior citizens of the canine community when they reach 11 years of age. Their medium-sized friends become seniors at 10 years of age. Their larger sized colleagues are seniors at 8 years of age.

ReviewsWrite a Review

Rated 4.5027 out of 5 stars
187 Reviews
Would recommend to a friend

187 Customer Reviews

Rated 5 out of 5 stars
By Pamela on Nov 7, 2022

Great food

My senior St. Dane loves this kibble. She's almost 11 and took a liking to this right away. Dates still got a spring in her step and enough energy to play with her 11 week old puppy brother!!!

Rated 5 out of 5 stars
By dogmom on Aug 21, 2022

My trio approves

I have 2, 7 year old's and a 5-year-old with hip dysplasia-so i figured this would be ok for her as well. All 3 love it-one of them is quite picky i usually have to add stuff for him to eat -first try he ate it plain. The pieces are nice sized-i plan on keeping them on this -i have always been happy with Iams -my puppy gets it as well as my cat

Rated 5 out of 5 stars
By DOGMOM on Sep 23, 2022



Rated 5 out of 5 stars
By MissCallie2022 on Nov 6, 2022

Angels favorite food

My senior dog needed a change from the food she's been on for years switched to Iams she loves it very happy

Rated 1 out of 5 stars
By wetfood on Jul 21, 2022

dogs got horrible gas

I ordered this because we could not get any more of our usual food, big mistake. I did not expect my dogs to get so gassy . I am not a fan. Will go back to my other food as soon as possible. I also did not like the amount of chicken byproducts. I missed that when ordering. I thought Iams would be a good dog food but it is not.

Rated 5 out of 5 stars
By Richard on Nov 1, 2022

Great food, Great price!

It is nice to go back to Iams brand of dog food. I used it in the past, and now am using it again.

Rated 1 out of 5 stars
By Tman on Aug 7, 2022

something rotten in food

Our dog won’t even eat it anymore - left bowl for days. She is a black lab and eats everything! Tried new bag same thing! Must be something rotten in it. Bought her a bag of regular food at convenience store and ate it.

Rated 5 out of 5 stars
By Trapper on Aug 7, 2022

Been my go to

I have always trusted Iams for my dogs. I have switched my oldest to this mature now for 3 years as he is 10. Still acts playful and goes up stairs. He is 150# Presa Canerio.

Rated 2 out of 5 stars
By TPYH on Apr 27, 2022

Wrong food for medium size dogs. food is too big

i have been buying Iam's dog food for many years and it is a very good dog food. In April I bough this and didn't notice that it is for large breed dogs, so I have dog food that my dog can't chew up. I have talked to Chewy and and say sorry they don't get the same food for Medium dogs and that is all they have. Chewy didn't let me know that this 15# bags was not the same as the other 15# bags I have been buying for a long time. not good!! So I have decided to go to another buyer and get the size dog food I need.

Rated 5 out of 5 stars
By Nitwitt100 on Apr 17, 2022

Ol Girl Likes This Flavor Better!

Our Aussie was eating the Weight Management IAMS, but she got finicky about it after a couple bags. It did help her lose a few pounds while she was on it, but she just stopped eating it. So we bought the IAMS Chicken Senior Dog Food and so far so good with a half of the bag gone, she isn't hesitating to eat this flavor. Came quickly after switching.