Best Grain-Free Wet Dog Food 2026
Grain-free is one of the fastest-growing pet food categories, but the FDA's investigation into a possible link with heart disease raised serious questions. Here is what the evidence says as of 2026, and which grain-free products are best if you choose this route.
FDA DCM Investigation: What We Know
In July 2018, the FDA began investigating reports of dilated cardiomyopathy (DCM), a serious heart condition, in dogs eating grain-free diets. By 2020, the FDA had received over 1,100 reports of suspected diet-related DCM. Here is the timeline and what the findings actually mean.
Who Should Consider Grain-Free
May benefit from grain-free:
- Dogs with a veterinarian-confirmed grain allergy or intolerance. True food allergies affect roughly 1 to 2% of dogs, and grains are only one of several possible triggers (beef and dairy are more common allergens).
- Dogs with diagnosed celiac-like conditions, which are extremely rare in dogs but do exist, particularly in Irish Setters.
Probably should not switch:
- Dogs without diagnosed grain issues who are switching “just because” grain-free seems healthier. There is no evidence that grain-free diets are nutritionally superior for dogs without grain sensitivities.
- Dogs with a family history of DCM or breeds predisposed to heart disease (Golden Retrievers, Dobermans, Boxers, Great Danes). The FDA investigation warrants extra caution for these breeds.
- Dogs whose current grain-inclusive food is working well. If your dog has good coat condition, healthy stools, normal energy, and a healthy weight, there is no nutritional reason to switch.
Grain-Free Wet Food Comparison
Protein on dry-matter basis. Legume content rated by position in ingredient list. Taurine supplementation noted where listed.
| Brand / Product | Protein (DM) | Primary Carb Source | Legume Content | Taurine Added | Price/Can | AAFCO |
|---|---|---|---|---|---|---|
| Merrick Grain Free (Cowboy Cookout) | 45.5% | Sweet potato, peas | Moderate | Yes | $2.99 | Adult Maintenance |
| Wellness CORE (Chicken & Turkey) | 50.0% | Potato, peas | Moderate | Yes | $3.29 | All Life Stages |
| Blue Wilderness (Turkey & Chicken) | 45.5% | Potatoes, pea protein | High | Yes | $2.99 | Adult Maintenance |
| Instinct Original (Chicken) | 45.5% | Montmorillonite clay, peas | Low | Not listed | $3.49 | All Life Stages |
| Taste of the Wild (Pacific Stream) | 44.4% | Sweet potatoes, peas | Moderate | Not listed | $2.49 | All Life Stages |
| Natural Balance L.I.D. (Chicken) | 36.4% | Potatoes | None | Not listed | $2.99 | All Life Stages |
| Canidae PURE (Chicken) | 42.9% | Peas, sweet potatoes | Moderate | Not listed | $3.29 | All Life Stages |
| Nutro Grain Free (Beef) | 40.9% | Sweet potato, potato | Low | Not listed | $2.69 | Adult Maintenance |
What to Look for in Grain-Free Wet Food
If you and your vet have decided grain-free is appropriate for your dog, choose carefully. Not all grain-free foods carry the same risk profile.
Avoid legumes in the top 5 ingredients
The FDA's concern centered on legume-heavy formulas where peas, lentils, and chickpeas replaced grains as the primary carbohydrate source. If multiple legume ingredients appear in the top 5, the formula is likely legume-heavy. Natural Balance L.I.D. is notable for using potatoes instead of legumes.
Look for added taurine
Many affected dogs in the DCM investigation had low taurine levels. Taurine is an amino acid essential for heart function. While dogs can synthesize taurine from methionine and cysteine, some may not produce enough. Merrick and Wellness CORE both add taurine to their grain-free formulas.
Verify AAFCO compliance
Some grain-free products are labelled “for supplemental feeding only” and should not be the sole diet. Always check the nutritional adequacy statement. All products in our comparison table are AAFCO compliant.
Grain-Free vs Grain-Inclusive: Side by Side
| Factor | Grain-Free | Grain-Inclusive |
|---|---|---|
| Protein (DM avg) | 42 to 48% | 36 to 42% |
| Carb source | Potatoes, peas, lentils | Rice, barley, oats |
| DCM concern | Under investigation | No association |
| Price range | $2.49 to $3.49/can | $1.49 to $2.99/can |
| Digestibility | Generally high | Generally high |
| Appropriate for | Dogs with grain allergies | Most dogs |
For dogs without diagnosed grain sensitivities, grain-inclusive wet food is generally the safer and more affordable default. Grains like rice and oats are well-tolerated by the vast majority of dogs and provide a proven, well-studied carbohydrate source without the potential DCM concerns associated with legume-heavy grain-free formulas.