The scores
Zignature: C (73/100) — Average. A limited-ingredient, single-protein formula built around turkey as its sole animal source, with chickpeas and peas as the primary carbohydrates.
Taste of the Wild: B (78/100) — Above average. A multi-protein grain-free formula with three named animal proteins from three different species in the top three positions.
A 5-point gap is narrower than our other comparisons, but it crosses the C-to-B grade threshold — and that matters. Moving from a C into B territory reflects a meaningful step up in protein sourcing. The gap here is driven primarily by one factor: protein diversity. Taste of the Wild uses three animal species where Zignature uses one, and that single difference has cascading effects on amino acid completeness and nutritional balance.
How the ingredients compare
The top five ingredients reveal the core philosophy difference between these two brands:
Zignature: Turkey, Turkey Meal, Chickpeas, Peas, Flaxseed
Taste of the Wild: Buffalo, Lamb Meal, Chicken Meal, Sweet Potatoes, Peas
Both formulas start strong with a named whole meat in the first position. Zignature leads with turkey, while Taste of the Wild leads with buffalo. Both follow with a named animal meal in the second position — turkey meal for Zignature, lamb meal for Taste of the Wild. So far, so similar.
The divergence happens at position three. Taste of the Wild places a third animal protein — chicken meal — while Zignature fills that slot with chickpeas, a legume. From this point forward, Zignature’s formula is built around plant carbohydrates and fats (chickpeas, peas, flaxseed), while Taste of the Wild maintains its protein emphasis before introducing carbohydrate sources (sweet potatoes, peas).
Both brands avoid grains entirely, relying on legumes and tubers for carbohydrates. Both avoid by-products, artificial preservatives, and cheap fillers. The ingredient quality is solid in both cases — the difference is how many animal protein sources each formula includes and how diversified those sources are.
Where Taste of the Wild pulls ahead
Protein diversity from three species: Taste of the Wild includes buffalo, lamb, and chicken — three entirely different animal species. Each species provides a slightly different amino acid profile, fatty acid composition, and micronutrient content. Buffalo is leaner and higher in iron than most poultry. Lamb provides unique fatty acids and is richer in zinc. Chicken delivers highly bioavailable protein that dogs digest efficiently. Together, these three sources create a more complete nutritional picture than any single protein can provide on its own.
Novel protein at the top: Buffalo is a novel protein for most dogs — meaning their immune systems haven’t been repeatedly exposed to it the way they have with chicken, beef, or turkey. This can be beneficial for dogs with mild food sensitivities that haven’t risen to the level of a diagnosed allergy. Many dogs with vague digestive issues or itchy skin do better on a formula that includes proteins they haven’t eaten daily for years. Taste of the Wild’s buffalo-first formula offers this novelty advantage while still including familiar proteins further down the list.
Better carbohydrate sourcing: While both formulas use peas, Taste of the Wild uses sweet potatoes as its primary carbohydrate source where Zignature relies on chickpeas. Sweet potatoes are a nutritional standout among dog food carbohydrates — they’re rich in beta-carotene (a precursor to vitamin A), vitamin C, manganese, and dietary fiber. Chickpeas are nutritionally fine, but sweet potatoes provide a more robust micronutrient contribution. Taste of the Wild’s flaxseed equivalent is also handled through other omega-rich sources in the full formula.
Value proposition: Taste of the Wild is widely available and competitively priced for a B-grade grain-free food. Zignature, positioned as a limited-ingredient premium option, often costs slightly more per pound. Paying a premium for a C-grade formula is a harder sell when a B-grade alternative with better protein diversity is available at the same price point or lower. The limited-ingredient premium only makes sense if your dog specifically needs it for medical reasons. Shop on Amazon →
Where Zignature holds its own
Zignature’s entire value proposition is the limited-ingredient, single-protein design — and for the right dog, that’s a significant advantage. Dogs with confirmed food allergies or protein intolerances need to eat a formula where the protein source is tightly controlled. If your veterinarian has identified chicken, beef, lamb, or fish as an allergen for your dog through an elimination diet, Zignature’s turkey-only formula provides a clean single-source option that avoids those triggers entirely.
The shorter ingredient list also makes it easier to identify what’s causing a reaction if your dog does show sensitivity. With Taste of the Wild’s three animal proteins plus multiple carbohydrate sources, pinpointing a problem ingredient becomes much harder. Zignature’s minimalist approach is essentially built for the diagnostic process — fewer variables mean faster answers when something goes wrong.
Zignature also offers the same limited-ingredient philosophy across multiple single-protein options: turkey, lamb, salmon, kangaroo, venison, and others. If your dog does well on the turkey formula, you can rotate to a different single-source protein within the same brand for variety without reintroducing the complexity of multi-protein blends. This controlled rotation approach is something veterinary nutritionists sometimes recommend for allergy-prone dogs.
Finally, flaxseed in Zignature’s top five provides a plant-based source of omega-3 fatty acids (ALA), fiber, and lignans. While plant-based omega-3s are less bioavailable than the fish-derived EPA and DHA found further in Taste of the Wild’s formula, flaxseed is still a quality functional ingredient that contributes to coat health and digestive regularity. Shop on Amazon →
The bottom line
For the majority of dogs, Taste of the Wild is the better food. Its multi-protein approach provides a more complete amino acid profile, its ingredient quality earns a higher grade, and its price point is competitive. The B/78 score reflects a well-formulated grain-free food that delivers solid nutrition from diverse animal sources.
Zignature at C/73 isn’t a bad food — it’s an average food designed for a specific medical purpose. If your dog has a confirmed protein allergy and needs a single-source formula, Zignature serves that need well. The limited-ingredient design is the product, not a limitation. But if your dog doesn’t have diagnosed food allergies, there’s no nutritional benefit to restricting them to a single protein source — and you’re paying a premium for a lower-scoring formula in the process.
The smart approach: use Zignature if your vet recommends it for allergy management. Use Taste of the Wild for everything else. Read our full reviews of Zignature and Taste of the Wild for the complete ingredient analysis on each.