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DIAMOND

Diamond Maintenance Adult Dry Dog Food, Chicken Protein, 40lb

  • Based on 2,387 reviews
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Arrives Friday, Sep 4
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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 veterinarians, 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 Kibble


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: #2,517 in Pet Supplies (See Top 100 in Pet Supplies) #206 in Dry Dog Food


#206 in Dry Dog Food:


Customer Reviews: 4.5 4.5 out of 5 stars (2,387)


Brand Name: DIAMOND


Flavor: Maintenance


Age Range Description: Adult


Item Form: Dry Kibble


Specific Uses For Product: active, coat


Special Ingredients: all-natural


Container Type: Bag


Breed Recommendation: All Breed Sizes


Allergen Information: Cashews Free


Dog Breed Size: Medium


Product Benefits: Supports skin & coat health, builds lean muscles, aids digestion & immunity


UPC: 074198003402


Additional Features: Made with veterinarian and pet nutritionist input, includes probiotics and antioxidants, and uses quality global ingredients.


Recommended Uses For Product: Maintenance for moderately active adult dogs, Overall health and well-being support


Animal Food Diet Type: Veterinary Diet


Global Trade Identification Number: 02


Target Species: Dog


Pet Type: Dog


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.


Item Type Name: Pet Food


Manufacturer: Diamond Pet Foods, Inc.


Model Number: 101_40_DMD


Occasion: Birthday


Manufacturer Part Number: 74198003402


Unit Count: 640 Ounce


Number of Items: 1


Item Weight: 40 pounds


Package Size Name: 40 lb


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Sep 4

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 price
Flavor Name: Maintenance Size: 20 Pound (Pack of 1)
Diamond brand dog food is difficult to find but this price at Amazon you can't beat. My Mini Schnauzer loves this dog food
Reviewed in the United States on July 3, 2026 by David
    • Priced right for Active Healthy Dogs
Flavor Name: Maintenance Size: 40 Pound (Pack of 1)
The dogs love it! Every time the bag arrives the dogs are standing over it ready to plunge in. We have 2 pits 4yrs and a 7mo German shepherd and they all love this food. Was looking for a food and brand that was good for health and coats that was also tasty and never boring, this was it; since they are picky eaters. The price is right and for big dogs, the bag lasts about a month. No diarrhea either. Would recommend for young and older for active and moderately active. They never get tired of it either. ... show more
Reviewed in the United States on December 27, 2025 by Michael C.
    • Affordable
Flavor Name: Maintenance Size: 40 Pound (Pack of 1)
Dogs like it
Reviewed in the United States on June 19, 2026 by Rob
    • They like it!
Flavor Name: Maintenance Size: 40 Pound (Pack of 1)
Purchased for 2 large dogs. They like it and it seems to be doing the job of maintaining their weight just fine.
Reviewed in the United States on July 11, 2026 by Stall cleaner
    • Healthy and affordable!
Flavor Name: Maintenance Size: 40 Pound (Pack of 1)
I wanted a simple, yet healthy and affordable dog food for my pups and this is it. Nowadays there are so many different flavors and options to choose from that it can be overwhelming when looking for the perfect dog food. I love that this one provides healthy nutrition without the premium price tag like some brands. I have two large pit bull mixes and they seem to love the taste. ... show more
Reviewed in the United States on May 22, 2026 by Taylor Ashley
    • Delivered To Home At Brick & Mortar Store Prices!
Flavor Name: Maintenance Size: 40 Pound (Pack of 1)
Great food. All 7 dogs enjoy it. This price is and has been exactly the same as Tractor Supply but is delivered to home by Prime.
Reviewed in the United States on May 21, 2026 by Rastus
    • So far so good will update in a couple weeks
Flavor Name: Maintenance Size: 40 Pound (Pack of 1)
So far so good dogs are liking the food, the only thing that I have found to be very disturbing. Is they have excessive amount of farting issues after eating this food. At this point, I am not sure if it’s a good thing or a bad thing. I will continue to watch and follow up with you guys. The size of dog food is perfect for the price. I have not seen any diarrhea at this time I will give it a couple more days before I rate it a five star or below, depending on how these dogs react to it. The breed of dog I have are female pitbull‘s prone to allergies indoor outdoor and all three of them are 136 pounds. Give or take.. I will follow up with you in a couple weeks for updates on my adult pitbull. ... show more
Reviewed in the United States on March 19, 2026 by Sequoia

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