Diamond Puppy 31/20 High Protein Dry Dog Food 40 lb

Item Weight: 40 pounds
Package Size Name: 40 Pound
Animal Food Diet Type: Veterinary Diet
Target Species: Dog

Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.

Our verdict

A high-protein, DHA-supplemented growth formula for puppies and reproducing adult dogs, sold in a large bag suited to bigger households or larger breeds.

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ASIN: B000WFIYQUModel: Puppy 31/20Category: Dry Pet Foods

Overview

A dry dog food formulated for puppies as well as pregnant and nursing adult dogs, sold in a large 40 pound bag. Diamond lists it under a large-breed recommendation with a small-bites kibble shape.

The 31/20 in the name refers to the protein and fat percentages of the formula. It's built around DHA for brain and vision development in growing puppies, with omega fatty acids and antioxidants added, and Diamond frames it as suitable across the puppy growth period and for dogs that are pregnant or nursing.

40 lb bag
31/20 protein-to-fat formula
DHA for brain and vision development
Small-bites kibble shape

Who it's for

Fits owners with a large-breed puppy, or a pregnant or nursing adult dog, who want a high-protein growth formula in bulk. Less suited to households wanting a small bag to try the food first.

Pros and cons

Pros

High protein and fat levels for growth
DHA added for brain and vision development
Suitable for pregnant and nursing dogs too
Large 40 lb bag

Cons

Large bag size isn't ideal for trying the food first
Formulated for large breeds, not labeled for toy or small breeds

Performance notes

DHA in the formula supports brain and vision development during the puppy growth window, while the higher protein and fat levels of 31/20 are aimed at the increased energy needs of growth, pregnancy and nursing. The small-bites shape is meant to suit growing or smaller jaws.

Specifications

Dimensions & fit
Brand	Diamond
Model	Puppy 31/20
Item Weight	40 poundshigher than 97% of 150 dry pet foods
Package Size Name	40 Pound
Dog Breed Size	Large
Capacity & performance
Age Range Description	Puppy
Included components
Unit Count	40 pounds
Included Components	The Nutrition A Puppy Receives In The First Year Can Influence Overall Health Later In Life. Diamond Puppy Is Formulated With The Help Of Veterinarians And A Pet Nutritionist To Meet The Special Nutritional Needs Of Rapidly Growing Puppies. Enhanced With DHA For Proper Brain And Vision Development, This Recipe Includes Omega Fatty Acids, Antioxidants And Proper Levels Of Protein And Fat, To Help Puppies Grow Up Strong. Diamond Puppy Is Also Suitable For Pregnant Or Nursing Adult Dogs
Other details
Animal Food Diet Type	Veterinary Diet
Target Species	Dog
Allergen Information	Allergen-Free
Flavor	Puppy
Special Ingredients	all-natural
Animal Food Nutrient Content Claim	High Protein
Item Form	Pellet
Breed Recommendation	Large Breeds
Container Type	Bag
Pet Type	Dog
Number Of Items	1
Specific Uses For Product	Coat
Product Benefits	Supports puppy growth, brain development, and immune health; suitable for pregnant/nursing dogs
Occasion	Birthday
Recommended Uses For Product	Puppy growth and development, Pregnant and nursing dogs
Additional Features	Small Bites
Asin	B000WFIYQU
Best Sellers Rank	#2,492 In Pet Supplies (See Top 100 In Pet Supplies) #189 In Dry Dog Food
Manufacturer	Diamond Pet Foods, Inc.
Upc	074198002405
Item Type Name	Pet Food
Manufacturer Part Number	120_40_DPP
Model Number	120_40_DPP
Customer Reviews	{'ratings_count': '6,749', 'stars': '4.6'}
Item Shape	Rectangular