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What's actually in 4Health?
We analyzed 4Health Adult Salmon & Potato Formula Grain-Free, one of the more popular products in Tractor Supply's house brand lineup. The first five ingredients are salmon, salmon meal, potatoes, peas, and potato starch.
Starting with whole salmon is a good sign — it's a named, quality animal protein. Salmon meal in the second position is even better in terms of protein density, since the water has already been removed (roughly 3x the protein of whole salmon by weight). Having two fish-based proteins before any carbohydrate source is a genuinely strong opening for a store-brand food at this price point. Shop on Amazon →
The good stuff
The double salmon foundation is the standout here. Whole salmon provides quality protein and natural omega-3 fatty acids, while salmon meal concentrates that protein further. You're getting meaningful animal protein before the formula shifts to starches and fillers.
The omega-3 profile gets a second boost from flaxseed and fish oil later in the list. That's two plant-based and two animal-based omega-3 sources total — a combination that supports coat health, skin condition, and joint function. Many brands at this price tier offer zero dedicated omega-3 ingredients beyond what's naturally in the meat.
Chicken fat preserved with mixed tocopherols is worth highlighting. Mixed tocopherols are a natural form of vitamin E used as a preservative — a clear step above the artificial preservatives (BHA, BHT, ethoxyquin) that show up in lower-tier foods. The taurine addition is also a thoughtful inclusion, particularly for a grain-free formula where taurine deficiency has been a concern.
The not-so-good stuff
The carbohydrate situation is where 4Health loses points. Potatoes and potato starch both appear in the top five — that's essentially the same ingredient showing up twice under different names, a tactic that spreads out starch content so no single carb entry looks too dominant. Combined with peas in the fourth position, the starch-to-protein ratio is heavier than the first two ingredients suggest.
There are no named fruits or vegetables anywhere in the formula. Tomato pomace is technically plant-derived, but it's a by-product of tomato processing — essentially the leftover skins and seeds after the juice is extracted. It provides some fiber, but it's not the same as having blueberries, cranberries, or sweet potatoes on the list.
The formula also lacks prebiotics, probiotics, and chelated minerals — three categories that separate good foods from great ones. Chelated minerals (minerals bound to amino acids for better absorption) are becoming standard in B-tier and above foods. Their absence here is a clear cost-cutting measure. And as a grain-free formula, 4Health falls into the ongoing FDA investigation into a potential link between grain-free diets and dilated cardiomyopathy (DCM) in dogs — something worth discussing with your vet.
How it compares
4Health's B grade (78/100) puts it on level footing with the budget B-tier benchmarks: Kirkland Signature (B/78), Diamond Naturals (B/78), and Taste of the Wild (B/78) all share the same 78-point score. 4Health distinguishes itself with the double-fish-protein lead — most B/78 budget formulas lead with chicken or beef.
It clearly beats lower-tier alternatives like Purina ONE (C/58), where chicken by-product meal does the heavy lifting instead of named whole protein. The 4Health formula skips chelated minerals, named fruits and vegetables, and prebiotic fiber sources — those would push it higher within the B tier — but the salmon-first foundation earns it the B grade outright.
Read the full breakdown in our 4Health vs Diamond Naturals head-to-head comparison.
The bottom line
4Health Adult Salmon & Potato Grain-Free earns a B grade (78/100) from KibbleIQ. The double salmon protein base and dual omega-3 sources make it one of the better store-brand options available, and the natural preservatives are a welcome touch. The potato/potato starch double-up and absence of fruits, vegetables, prebiotics, and chelated minerals keep it from climbing higher inside the B tier — but the salmon-first foundation lands it on the B/78 line alongside Diamond Naturals and Kirkland Signature. For a Tractor Supply house brand at a budget price, you're getting genuine B-tier value. Shop on Amazon →