Diamond Puppy 31/20 High Protein Dry Dog Food 40 lb
- 40 pound bag, 640 ounces
- Puppies plus pregnant and nursing dogs
- 31/20 high protein formula
- Small bites, rectangular pellets
- Large breeds recommendation
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A protein-rich dry food for puppies and for mothers-to-be and nursing adults, in a large bag. The age range and the title disagree on whether other adult dogs are covered, so read the bag.
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ASIN: B000WFIYQUModel: Puppy 31/20Category: Dry Pet Foods
Overview
A growing large-breed puppy, or a dog expecting or feeding litters, gets a dry food in small rectangular pellets. The formula is marked as high in protein, with growth, brain development and immune health among the stated benefits.
A single food that spans puppyhood and nursing is convenient for a household with both. The limitation is a mixed message, since the age range says puppy while the title says all life stages, and there is no nutrient breakdown behind the formula name.
Who it's for
Households raising a puppy or feeding a nursing mother can keep one bag on hand. Owners of calm adult dogs, and anyone who wants the formula name explained, should look at other foods.
Pros and cons
- Small bites for puppies
- Covers nursing and pregnant dogs
- Large bulk bag
- Growth and brain support listed
- Age range conflicts with title
- Formula name is not explained
- Large breed sizing only
Performance notes
Small pellets are easier for young dogs to chew, and the protein level is aimed at growth and nursing demands. Portion size has to follow the dog's age and weight, and the page does not give a feeding chart or calorie count.
Specifications
| Brand | Diamond |
|---|---|
| Model | Puppy 31/20 |
| Dimensions & fit | |
| Dog Breed Size | Large |
| Weight | 40 pounds |
| Capacity & performance | |
| Age Range Description | Puppy |
| Included components | |
| Unit Count | 640 ounces |
| Other details | |
| Allergen Information | Allergen-free |
| Animal Food Nutrient Content Claim | High protein |
| Item Form | Pellet |
| Breed Recommendation | Large breeds |
| Container Type | Bag |
| Recommended Uses For Product | Puppy growth and development, pregnant and nursing dogs |
| Additional Features | Small bites |
| Item Shape | Rectangular |
| Animal Food Diet Type | Veterinary Diet |
| Item Type Name | Pet Food |
| Occasion | Birthday |
| Special Ingredients | all-natural |
| Specific Uses For Product | coat |
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Frequently asked questions
How should I start my puppy on Diamond Puppy 31/20?
The listing gives no transition or feeding directions, so follow the bag.
Can adult dogs eat Diamond Puppy 31/20?
The title says all life stages, including pregnant and nursing adults, while the age range spec says puppy. Check the bag for adult feeding amounts.
What does 31/20 mean in Diamond Puppy 31/20?
The listing does not explain the numbers, so it is best read as the formula name.
Is Diamond Puppy 31/20 for small breeds?
The breed recommendation says large breeds.