Grain-Free Wild-Caught Whitefish & Sweet Potato Formula Dry Dog Food
Verified Jun 10, 2026
This is a grain-free dry dog food that uses wild-caught whitefish and fish meal as its main protein sources, with sweet potatoes, peas, and lentils providing carbohydrates and fiber. It’s formulated for all life stages, including large-breed puppies, and includes added omega fatty acids, taurine, and probiotics to support skin, coat, and digestive health. The moderate protein and fat levels make it a reasonable everyday option for many dogs that do well on a fish-based, grain-free diet.
Nutritionally, this is a solid, mid–higher range grain-free option with fish-based protein and a reasonable protein and fat level for most dogs. It’s complete and balanced for all life stages, including large-breed growth, and includes probiotics, omega fatty acids, and added taurine. However, peas and lentils feature prominently, so I’d be cautious using it long term in breeds with a known risk for heart disease until we know more about the grain-free/DCM connection.
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At a Glance
KibbleLab Review
Strengths
- Whitefish and fish meal provide a clear animal protein base suitable for dogs that don’t do well on chicken or beef.
- Complete and balanced for all life stages, including large-breed puppies, which many foods are not formulated for.
- Includes added omega-3 and omega-6 fatty acids, which can help support skin and coat health.
- Probiotics and chicory root are included, which may support healthy digestion in many dogs.
Considerations
- Peas, lentils, and pea flour are high in the ingredient list, and legume-heavy grain-free diets have been linked to heart issues in some dogs.
- Fish-based diets can be a problem for dogs with fish allergies or for those that dislike fish flavors.
- Protein at 24% is adequate but a bit lower than some other grain-free, fish-based foods that active or very lean dogs may benefit from.
- As with any grain-free diet with prominent legumes, I’d be cautious in breeds already at risk for dilated cardiomyopathy and discuss with your vet.
Full Ingredient List
Ingredients and analysis reflect manufacturer data at the time of our last update and can change without notice. Always check the actual product packaging before feeding.
Ingredient filtering helps identify compatible options but is not a substitute for a veterinary elimination diet.
Top 5 Ingredients Explained
01
Whitefish
Whitefish (such as pollock, cod, or haddock) is commonly used in pet foods as a lean animal protein source that provides high‑quality essential amino acids, good digestibility, and some omega‑3 fatty acids to support skin, coat and muscle maintenance. While generally palatable and useful for weight‑managed formulas, pet parents should be aware of potential fish allergies and the importance of responsible sourcing and processing to minimize contaminants; cats also require adequate dietary taurine, so whitefish should be part of a complete, balanced diet.
02
Fish
Fish is commonly used in pet foods as a highly digestible animal protein and an excellent source of omega‑3 fatty acids (EPA and DHA) that support skin and coat health, joint function, and cognitive development in both dogs and cats. It also supplies B vitamins and minerals but can be a common allergen, may contain environmental contaminants or mercury depending on species and sourcing, and raw fish can contain thiaminase—so choose properly processed, nutritionally balanced, and sustainably sourced fish ingredients.
03
Sweet Potato
Sweet potato is used in pet foods as a digestible carbohydrate and source of soluble fiber, vitamins (notably beta‑carotene), minerals and antioxidants, often helping with stool quality and serving as a binder or energy ingredient. It is generally well tolerated by dogs and can support gut health, but because cats poorly convert beta‑carotene to vitamin A and require preformed vitamin A from animal sources, sweet potato is not a substitute for meat-based nutrients; its relatively high carbohydrate content also means portion control is advised for overweight or diabetic pets and it should be cooked for best digestibility.
04
Pea
Pea is a plant-based ingredient used in pet foods as a source of protein, soluble and insoluble fiber, and micronutrients (often included as whole peas, pea flour, or pea protein concentrate) to boost protein content and improve texture. While peas can provide digestible carbohydrates, fiber, and some plant protein useful especially for dogs, they are not a complete protein for obligate carnivores like cats and — when overused, particularly in concentrated forms or as a major component of grain‑free diets — have been scrutinized for a possible association with canine dilated cardiomyopathy and can contribute to nutrient imbalances or excess calories, so balanced formulation and compliance with AAFCO nutritional profiles are important.
05
Lentil
Lentils are a plant-based source of protein, complex carbohydrates, fiber and micronutrients (notably folate and iron) commonly used in pet foods to add bulk, promote satiety and help moderate post-meal blood sugar. They can be a useful ingredient for dogs when properly processed and balanced with animal-derived amino acids, but lentil protein is less digestible and incomplete for obligate carnivores like cats; high legume inclusion can also increase gas or digestive upset and has been discussed in the context of diet-associated heart concerns in dogs, so lentils should be used in nutritionally complete, vetted formulations.
Nutritional Breakdown
How to read As Fed versus Dry Matter
As fed shows the numbers straight off the label, water included. Dry matter removes the water so you can compare a wet food and a dry food fairly.What is calorie density
How many calories the food packs per unit. Denser foods mean smaller portions for the same calories.Product Details & Brand
Product Specs
AAFCO Nutritional Adequacy
What is AAFCO
Association of American Feed Control Officials. It sets the nutritional
adequacy standards US pet foods are measured against.
What is AAFCO
Association of American Feed Control Officials. It sets the nutritional adequacy standards US pet foods are measured against.Brand
Diamond Naturals is a mid-range premium brand featuring whole-food ingredients and added probiotics for digestive health. It provides grain-inclusive and grain-free formulas designed for balanced nutrition and holistic wellness.
Visit Diamond NaturalsManufacturer
Diamond Pet Foods maintains a rigorous quality assurance program that includes in-house testing for mycotoxins, pathogens, and nutritional analysis. The company adheres to FDA, AAFCO, and HACCP standards, employing extrusion and cooking processes designed to ensure product safety.
Manufacturing details are compiled from public sources and not independently verified; they may not reflect contract manufacturing or co-packing.
Recall History
Diamond Naturals Grain-Free Wild-Caught Whitefish & Sweet Potato Formula Dry Dog Food has no recalls since 2014.
Source: FDA Pet Food Recall Database · Monitored daily
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Frequently Asked Questions
Has Diamond Naturals ever been recalled?
We have no recalls on record for Diamond Naturals. We monitor the FDA Pet Food Recall Database daily.
How does KibbleLab rate foods?
Our scores are based on ingredient composition, nutritional profile, AAFCO compliance, and health considerations. We don't penalize by-products, grains, or synthetic preservatives. Brands cannot pay for higher scores.
Is KibbleLab a substitute for veterinary advice?
No. KibbleLab provides data-driven food analysis, not medical advice. Always consult your veterinarian before making dietary changes, especially for pets with health conditions.
KibbleLab provides informational content only. This is not veterinary advice. Always consult a qualified veterinarian before changing your pet's diet.
KibbleLab may earn affiliate commissions through product links. No one can pay for a higher score, or to change what we recommend for your pet.
Product data sourced from manufacturer websites, AAFCO statements, and FDA recall database. Last verified dates reflect our most recent data check.
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