Best Medium Breed Grain-Free Dog Food 2026
Grain-free diets have remained popular for medium breed dogs with confirmed grain sensitivities. The FDA’s investigation into a potential link between grain-free diets and dilated cardiomyopathy (DCM) is an important consideration. For medium breed dogs with confirmed grain allergies, here are the five best grain-free options in 2026. For dogs without grain sensitivities, our medium breed food guide covers excellent grain-inclusive options.
Quick Comparison: Top 5 Picks
| Product | Protein | Best For | Rating | Price |
|---|---|---|---|---|
| Taste of the Wild High Prairie | Roasted Bison & Venison | Novel protein grain-free | 4.7/5 | Check Price on Chewy |
| Merrick Grain-Free Chicken & Sweet Potato | Real Chicken | Grain-free medium breeds | 4.6/5 | Check Price on Chewy |
| Wellness CORE Original Grain-Free | Deboned Chicken & Turkey | High-protein grain-free | 4.8/5 | Check Price on Chewy |
| Canidae Grain-Free PURE Elements | Multi-protein | Limited ingredient grain-free | 4.6/5 | Check Price on Chewy |
| Instinct Raw Boost Grain-Free | Chicken & Freeze-Dried Raw | Raw-enhanced grain-free | 4.7/5 | Check Price on Chewy |
Our Top Picks: In-Depth Reviews
Taste of the Wild High Prairie
Taste of the Wild High Prairie offers roasted bison & venison protein ideally suited for novel protein grain-free. This formula provides complete and balanced nutrition with an emphasis on quality ingredients and appropriate calorie density for the target group.
Pros:
- Excellent roasted bison & venison protein source
- Designed for novel protein grain-free
- High palatability
- AAFCO-approved nutrition
Cons:
- Premium price point
- May not suit every individual dog
- Contains some non-meat ingredients
Merrick Grain-Free Chicken & Sweet Potato
Merrick Grain-Free Chicken & Sweet Potato is a veterinarian-trusted formula delivering real chicken protein with excellent digestibility. Its targeted nutrition profile addresses the specific needs of grain-free medium breeds.
Pros:
- Vet-recommended formula
- Highly digestible ingredients
- Backed by nutritional research
- No artificial additives
Cons:
- Not grain-free
- Higher cost than budget brands
- Transition period may be needed
Wellness CORE Original Grain-Free
Wellness CORE Original Grain-Free combines quality deboned chicken & turkey protein with thoughtfully selected carbohydrate and fat sources. Formulated for high-protein grain-free, this option has strong palatability and consistent ingredient quality.
Pros:
- Quality protein as first ingredient
- Consistent ingredient quality
- Strong palatability
- Good value for quality
Cons:
- Contains by-product meal
- Some sensitive dogs may react
- Not ideal for all dietary restrictions
Canidae Grain-Free PURE Elements
Offering multi-protein protein in a formula built for limited ingredient grain-free, Canidae Grain-Free PURE Elements provides complete nutrition without artificial preservatives, colors, or flavors. A solid choice for health-conscious pet owners.
Pros:
- No artificial preservatives or colors
- Quality protein source
- Good digestibility
- Appropriate for target group
Cons:
- More expensive than grocery-store brands
- Limited store availability in some areas
- Calorie density requires monitoring
Instinct Raw Boost Grain-Free
Instinct Raw Boost Grain-Free rounds out our list with chicken & freeze-dried raw protein and a formula tailored for raw-enhanced grain-free. It offers excellent nutritional value and a strong ingredient panel for the price.
Pros:
- Great value for the quality
- Appropriate for stated use case
- Widely available
- Good ingredient transparency
Cons:
- Not the highest protein content
- Some formulas contain grain
- Palatability varies by individual dog
Buying Guide
Understanding the DCM-Grain-Free Connection
The FDA’s 2018-2020 alerts highlighted an association between grain-free diets with peas, lentils, chickpeas, and potatoes as primary ingredients and DCM in dogs. The mechanism remains unclear and causation unproven, but caution is warranted.
Safer Grain-Free Choices
If choosing grain-free, prioritize formulas where animal protein is the primary ingredient and legumes are not in the first five ingredients. Sweet potato-based grain-free may carry lower DCM risk than legume-heavy formulas.
The Case for Grain-Inclusive Formulas
For most medium breed dogs, high-quality grain-inclusive formulas provide equivalent or superior nutrition to grain-free. Brown rice, oatmeal, and barley are highly digestible and provide important B vitamins and fiber.
Monitoring on Grain-Free Diets
If your medium breed dog is on a long-term grain-free diet, request an annual echocardiogram to screen for early DCM. Early detection allows dietary intervention before cardiac function is significantly compromised.
Frequently Asked Questions
Is grain-free food necessary for medium breed dogs?
No, unless your dog has a confirmed grain allergy. Most dogs digest grains well. Unless grain allergy is confirmed, grain-inclusive food from reputable manufacturers is the safer recommendation.
What grain-free foods are considered safest given DCM concerns?
Formulas from brands that regularly test taurine levels, use meat as primary ingredients, and keep peas/lentils lower on the ingredient list are relatively safer. Always verify with your veterinarian.
My medium breed dog has been on grain-free for years and seems fine. Should I switch?
Consult your vet. Many dogs never develop DCM, but some develop subclinical cardiac changes before symptoms appear. An echocardiogram provides peace of mind.
What grains are most digestible for medium breed dogs?
Brown rice, oatmeal, and barley are the most digestible and nutritious grains for dogs. Corn, wheat, and soy are less preferred but not harmful in moderate amounts for most dogs.
*Disclosure: GetPetPros.com participates in affiliate advertising programs. When you purchase through links on this site, we may earn a small commission at no extra cost to you. Our editorial recommendations are independent.*