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What's actually in Solid Gold?
We analyzed Solid Gold Indigo Moon Chicken & Eggs Grain-Free, a dry kibble. The first ingredients are chicken meal, potatoes, canola oil, peas, chicken, dried eggs, and ocean fish meal, followed by a long list of fruits, vegetables, and leafy greens.
The guaranteed analysis is strong on paper: 42% crude protein, 20% fat, 3% fiber, and 10% moisture. That 42% protein figure is high for a dry food, and it points in exactly the right direction for an obligate carnivore. Cats are built to run on protein and fat, with a higher baseline protein requirement than dogs or people, so a kibble that leads with a concentrated meat protein and reaches the low-40s on protein is doing something most grocery-aisle foods do not.
Chicken meal opens the list, and that matters in a specific way. A meat "meal" is meat that has already had most of its water removed, so by weight it delivers far more actual protein than the same ingredient listed as fresh chicken would. As the number-one ingredient, it is a real, protein-dense anchor. After it, though, the base shifts toward plants: potatoes sit at number two and peas at number four, with canola oil at number three supplying the primary fat. Fresh chicken, dried eggs, and ocean fish meal add further animal protein lower down.
The back half of the list is where this formula gets distinctive. There is an unusually long botanical run, more than a dozen whole-food inputs including carrots, pumpkin, parsley, apples, cranberries, blueberries, lettuce, celery, beets, watercress, spinach, broccoli, spearmint, and thyme, plus dried kelp and lentils. The formula then finishes with dried Bacillus coagulans, a spore-forming probiotic, alongside the standard vitamin and mineral package. The food is labeled complete and balanced for all life stages under AAFCO standards. Shop on Amazon →
The good stuff
The protein number is the headline, and it is a good one. At 42% crude protein in a grain-free dry food, this sits well above the typical kibble, and the list backs it up: chicken meal leads, and fresh chicken, dried eggs, and ocean fish meal stack more animal protein into the recipe. For a cat, which derives its energy and essential amino acids from animal tissue, a protein level this high is a meaningful advantage over the starch-heavy formulas that dominate the shelf. The presence of a meat meal in the top slot is part of why the number lands where it does, since the moisture is already removed and the protein is concentrated.
The second real strength is the breadth of whole-food and functional ingredients, and this is what genuinely sets Indigo Moon apart from plain kibble. Most dry foods stop at one or two token vegetables. This one carries more than a dozen fruits, vegetables, and leafy greens, from pumpkin and carrots to blueberries, cranberries, spinach, broccoli, and watercress. These contribute fiber, natural antioxidants, and plant micronutrients, and while none of them replace meat for a carnivore, the variety reflects a deliberate antioxidant and whole-food positioning rather than filler-by-default.
Tied to that is the probiotic. Dried Bacillus coagulans is a spore-forming bacterium chosen specifically because its protective coat helps it survive the heat of kibble processing and the acidity of the stomach better than many fragile probiotic strains do. Paired with the fiber from pumpkin, kelp, and the vegetable run, it gives the formula a coherent gut-health story that most dry foods simply do not attempt. Ocean fish meal also brings marine-source omega fatty acids that cats use directly, rather than relying on plant-based precursors they convert poorly.
Taken together, these are not marketing flourishes. A high protein level, a wide antioxidant panel, and a heat-stable probiotic are real reasons this food scores in the upper part of its tier and comes within a single point of the B range.
The not-so-good stuff
The reason Indigo Moon lands at a C rather than a B comes down to the shape of its base, and it is worth being precise about why our rubric reads it the way it does. Chicken meal at number one is a strong start, but the next several slots tell a starch-forward story: potatoes at number two and peas at number four are both meaningful carbohydrate sources, and together they form a plant-heavy foundation underneath the meat. Cats have no real dietary requirement for carbohydrate, so a base built on potato and legume starch counts against a formula under our scoring, even when the headline protein is high.
Canola oil at number three compounds it. It is the formula's primary fat, and it is a plant oil rather than an animal fat like chicken fat. For an obligate carnivore, animal-source fat is the more species-appropriate energy and fatty-acid source, and leading with a plant oil costs points even though canola itself is not harmful. So you have a recipe where the single largest protein contributor is excellent, but the two ingredients right behind it are starches and the main fat is plant-derived. That meal-first, starch-second, plant-oil-third profile is exactly the pattern our rubric docks, and it is what separates a 74 from a 75.
A second, smaller caveat is the first ingredient itself. Chicken meal is concentrated and protein-dense, which is genuinely good, but it is a rendered, processed ingredient rather than fresh whole muscle meat. The very top cat foods open with one or more fresh, named whole meats and back them with meals, rather than leading with the meal alone. Indigo Moon does include fresh chicken, but it appears at number five, behind the starches.
Finally, be realistic about the superfood list. The botanical run is long and it is a genuine point of difference, but most of those fruits, vegetables, and greens appear well down the ingredient list, which means they are present in small amounts by weight. They add antioxidants and variety at the margins; they are not driving the bulk of the nutrition. That is normal for kibble and not a knock on the food's honesty, but it is worth keeping expectations calibrated: this is a high-protein kibble with a thoughtful garnish of whole foods, not a whole-food diet.
How it compares
At a C grade (74/100), Solid Gold sits right at the doorstep of the next tier. The closest reference point above it is Canidae (B/78), which clears the B line by a few points. The two foods share a similar high-protein, plant-inclusive philosophy, and the gap is narrow rather than dramatic, but Canidae edges ahead on the balance of its base. The bottom edge of the B range sits just one point above, at 75 — the clearest illustration of how close Indigo Moon comes: a single point separates Solid Gold's 74 from a B grade.
Looking the other direction, Solid Gold compares very favorably to the big mass-market names. It comfortably outscores Purina Pro Plan (C/58) by 16 points, and it sits well above Royal Canin (C/58) by the same margin. Both of those are household brands, and the distance reflects Indigo Moon's higher protein, its concentrated meat opener, and its far broader whole-food and probiotic panel. If you are weighing this food against a grocery-aisle staple, it is the stronger choice on the rubric by a clear margin.
The short version: Solid Gold is an above-average food that narrowly misses the "good" tier, beaten only slightly by the foods just above it and beating the common supermarket options handily.
The bottom line
Solid Gold Indigo Moon Chicken & Eggs earns a C grade (74/100) from KibbleIQ, and the fairest way to read that is as a strong upper-C food that comes within one point of a B. Its 42% protein is high for a kibble, its more than a dozen fruits, vegetables, and greens give it a real antioxidant and whole-food edge over plain dry food, and its heat-stable Bacillus coagulans probiotic backs a genuine gut-health story. What keeps it just under the line is the base: chicken meal leads, which is good, but potatoes and peas form a starch-forward foundation and canola oil stands in for an animal fat, a profile our rubric docks even at this protein level. If you want a high-protein, superfood-rich kibble and you are comfortable with a starchier, plant-oil base, this is an easy food to feel good about, and a clear step up from the mass-market shelf. Shop on Amazon →