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Diamond

Diamond Maintenance Adult Dry Dog Food 22/12 for Moderately Active Dogs 40lb Bag

  • Based on 2,873 reviews
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Arrives Saturday, Mar 21
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Flavor Name: Maintenance


Size: 40 Pound (Pack of 1)


Features

  • Made with purposeful, QUALITY INGREDIENTS and GUARANTEED NUTRIENTS including VITAMINS, MINERALS and AMINO ACIDS in every serving
  • CHICKEN PROTEIN is the first ingredient to help build and maintain LEAN, STRONG MUSCLES
  • Guaranteed OMEGA FATTY ACIDS to help support a SHINY COAT and HEALTHY SKIN
  • SUPPLEMENTED with a science-backed blend of PROBIOTICS, coupled with ANTIOXIDANTS, to help support healthy DIGESTION and a strong IMMUNE SYSTEM
  • FAMILY-OWNED and MADE IN THE USA with quality ingredients from trusted local and global sources

Description

Made to make a difference, Diamond Maintenance is designed for moderately active dogs and off-season periods of lower activity. This complete and balanced formula includes chicken protein as the first ingredient for a savory-tasting kibble your dog will love. Formulated with the help of veterinarians and a pet nutritionist, Diamond Maintenance is fortified with essential vitamins, minerals, omega fatty acids and amino acids to help support overall well-being and to help your dog achieve their full potential. Every bag of Diamond Maintenance is proudly made by a family-owned company in the USA with quality ingredients from trusted local and global sources.

Brand: Diamond


Flavor: Maintenance


Age Range (Description): Adult


Item Form: Dry


Specific Uses For Product: active, coat


Product Dimensions ‏ : ‎ 27 x 6 x 16 inches; 40 Pounds


Manufacturer recommended age ‏ : ‎ 1 month and up


Item model number ‏ : ‎ 101_40_DMD


Department ‏ : ‎ dog-dry-food


Date First Available ‏ : ‎ April 25, 2008


Manufacturer ‏ : ‎ Diamond Pet Foods, Inc.


Best Sellers Rank: #5,383 in Pet Supplies (See Top 100 in Pet Supplies) #301 in Dry Dog Food


#301 in Dry Dog Food:


Customer Reviews: 4.6 4.6 out of 5 stars 2,873 ratings


Item Weight: 40 pounds


Department: dog-dry-food


Manufacturer: Diamond Pet Foods, Inc.


Item model number: 101_40_DMD


Date First Available: April 25, 2008


Item Package Dimensions L x W x H: 23.5 x 16.5 x 4.25 inches


Item Dimensions LxWxH: 27 x 6 x 16 inches


Item Weight: 40 Pounds


Brand Name: Diamond


Target Audience Keyword: cat, dog, dogs


Model Name: 101_40_DMD


Size: 40 Pound (Pack of 1)


Age Range Description: Adult


Number of Items: 1


Style: 40 lb


Breed Recommendation: All Breed Sizes


Included Components: Formulated with the help of veterinarians and a pet nutritionist, Diamond Maintenance provides moderately active dogs with the balanced nutrition they need, day after day. Proper levels of fat and protein support a healthy body condition, with a great taste dogs love.


Specific Uses for Product: active, coat


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Mar 21

This item is non-returnable:

Non-returnable due to Food safety reasons

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Reliable, Affordable Nutrition for Multi-Dog Homes
Flavor Name: Maintenance Size: 40 Pound (Pack of 1)
I’ve been feeding my four dogs the Diamond Premium Recipe Maintenance formula for several weeks, and after seeing noticeable improvements, I wanted to share an honest, detailed review for anyone considering it. What I Like: Balanced nutrition This formula is designed for moderately active adult dogs, providing 22% crude protein and 12% crude fat. With four dogs of different sizes and energy levels, it’s been convenient to have one food that works for all of them. Coat and digestive support It contains flaxseed, chicken fat, fish meal, and probiotics for healthy digestion and skin. One of my older dogs, whose coat had started to look dull, now has a noticeable shine after about a month. Good value For a 40-pound bag, the quality and price point make this a practical option for families with multiple dogs. Made in the USA I appreciate that it’s made in the U.S. using ingredients from trusted sources. Transparency in sourcing matters to me. Easy feeding routine With four dogs, simplicity is key. Using one reliable adult formula makes feeding time quicker and easier to manage. What to Keep in Mind: Ingredients The first few ingredients include chicken by-product meal, wheat flour, and ground corn. While this may not appeal to owners who prefer grain-free or single-protein diets, I found the results justified the formula given my dogs’ needs and the price. Activity level This food is best suited for moderately active adult dogs. If you have high-performance or senior dogs with specific nutritional requirements, you might want to choose a more specialized formula. Transition period When switching to this food, introduce it gradually over 7 to 10 days to avoid digestive issues. My dogs transitioned easily without any stomach upset. Storage and freshness The 40-pound bag lasts a while with four dogs, but I recommend transferring it to a sealed storage bin to maintain freshness. My Experience Feeding time is always smooth—my dogs genuinely enjoy the taste and finish their bowls. Over the past few weeks, I’ve noticed healthier coats, more consistent energy, and improved digestion. Managing a multi-dog household, this food has made my routine simpler and more predictable. Final Thoughts For anyone managing several dogs or simply looking for an affordable, well-balanced adult formula, Diamond Premium Recipe Maintenance is a dependable option. It’s not a luxury grain-free food, but it offers solid nutrition, consistency, and great value for the price. If I were to rate it, I’d give it 4.5 out of 5 stars, only because some higher-end brands use more premium meats and fewer grains. Still, for a large household with mixed-breed or moderately active dogs, this has been an excellent choice. ... show more
Reviewed in the United States on October 26, 2025 by Chloe Sizer
    • Great food
Flavor Name: Premium Size: 40 Pound (Pack of 1)
We’ve been feeding this to our four dogs for the past 7 years. They are all very healthy and we get compliments from their vet every visit on how well they look. Their coats are shiny, it gives them plenty of energy, and they all like how it tastes.
Reviewed in the United States on October 19, 2025 by Kayt
    • Great maintenance for weight
Flavor Name: Maintenance Size: 40 Pound (Pack of 1)
Excellent food for my pit and poodle. No itching or allergies after eating. Maintains their weight.
Reviewed in the United States on October 20, 2025 by RIC CARR
    • Basic dog food, basic nutrition, but dog enjoyed
Flavor Name: Performance Size: 20 Pound (Pack of 1)
We fed this to our dog for about 3-4 years. It’s a basic crunchy kibble with minimal features. Affordable, basic levels of nutritious, easy to access.
Reviewed in the United States on August 11, 2024 by :)))
    • Great Value.
Flavor Name: Maintenance Size: 40 Pound (Pack of 1)
Excellent dog food brand.
Reviewed in the United States on September 20, 2025 by Virginia M.
    • Great stuff!
Flavor Name: Premium Size: 40 Pound (Pack of 1)
We have very large livestock guardian dogs. They are very active. This food provides the proper nutrition for our hard working dogs.
Reviewed in the United States on October 10, 2025 by Cathy Davisson
    • Quality food
Flavor Name: Maintenance Size: 40 Pound (Pack of 1)
Good quality
Reviewed in the United States on October 29, 2025 by Karen Stephan
    • The Absolute best transition experience from Diamond Puppy to Diamond Adult
Flavor Name: Maintenance Size: 40 Pound (Pack of 1)
The best transition from Diamond Puppy to adult food. The pellets are slightly (~2.5x bigger than puppy kibble, about the size of a dime) Our Pomsky was curious once the bag was opened. Handed her a piece to try and after that, she couldn’t wait until I filled her bowl so she stole some from the container before I could get the lid back on :) Very well balanced for her stomach, no oddities in stool activity. Great value, low odor. Will happily purchase again moving forward. ... show more
Reviewed in the United States on June 4, 2025 by Nate Dove

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