Bringing home a medium breed puppy means you’ve got a window of rapid growth ahead — and what you feed during these early months directly shapes their bone structure, muscle development, and long-term health. Choosing the right formula isn’t just about brand loyalty; it’s about matching protein levels, calcium ratios, and kibble size to your pup’s unique growth curve.
I’m Mo Mahin — the founder and writer behind Furric. I’ve spent years analyzing veterinary nutritional guidelines, comparing ingredient sourcing standards, and listening to real feedback from breeders and pet parents to separate marketing claims from genuine quality.
After extensive research into nutritional needs, this guide helps you choose the best puppy food for medium breeds for your growing young dog.
How To Choose The Best Puppy Food For Medium Breeds
Medium breed puppies — think Border Collies, Australian Shepherds, Bulldogs, and Cocker Spaniels — grow at a steady but not explosive pace. They need a balanced formula that supports gradual bone development without pushing rapid weight gain. The wrong calcium level or an overly high protein ratio can strain growing joints.
Understand the Growth Curve
Medium breeds typically reach maturity around 12 to 15 months. During this time, their calorie needs shift frequently. Look for a food that provides DHA for brain development, glucosamine for joint support, and a moderate fat content to maintain a lean body condition without overloading calories.
Check the First Ingredient
Real meat — chicken, beef, turkey, or fish — should appear as the first ingredient. Avoid formulas where corn, wheat, or unnamed meat meals lead the list. Whole meat provides essential amino acids that support muscle tone and energy levels throughout the day.
Kibble Size Matters
Medium breed puppies do best with a kibble sized for their jaw. Too large and they may struggle to chew; too small and they might inhale it without proper chewing. Many brands now offer breed-specific kibble shapes that encourage slower eating and better digestion.
Grain-Free vs. Grain-Inclusive
Both options can be healthy, but grain-free formulas often rely on lentils, peas, or sweet potatoes for carbohydrates. Some puppies with sensitive stomachs tolerate grain-inclusive recipes better. Observe your pup’s stool consistency and energy levels to decide which works best.
Quick Comparison
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| Model | Type | Best For | Key Feature | Amazon |
|---|---|---|---|---|
| Nulo Freestyle Salmon & Peas | Grain-Free | Muscle & brain development | 80% animal protein, DHA, BC30 probiotics | Amazon |
| Bil-Jac Puppy Select | Fresh Chicken | Sensitive stomachs | 12 lbs fresh chicken per bag, slow-cooked | Amazon |
| NutriSource Grain Free 12LB | Grain-Free | Gut health & digestion | Prebiotics, probiotics, blended proteins | Amazon |
| Purina ONE Plus Healthy Puppy | High Protein | Balanced daily nutrition | Real chicken #1, DHA, 4 antioxidant sources | Amazon |
| NutriSource Grain Free 4LB | Grain-Free | Small to medium breeds | Limited ingredient, turkey & fish protein | Amazon |
| Merrick Texas Beef & Sweet Potato | Grain-Free | High protein needs | Deboned beef first, glucosamine for joints | Amazon |
| Purina Puppy Chow High Protein | High Protein | Budget-friendly feeding | Real beef, tender & crunchy kibble mix | Amazon |
In-Depth Reviews
1. Nulo Freestyle Dry Puppy Food — Salmon & Peas
Nulo Freestyle hits the sweet spot for medium breed puppies because it delivers high animal-based protein without overloading fillers. Real deboned salmon leads the ingredient list, providing natural DHA for brain development and omega-3 fatty acids that support a shiny coat and healthy skin. The 6-pound bag size makes it easy to test before committing to a larger bulk purchase.
What sets this formula apart is the inclusion of BC30 probiotics — a clinically studied strain that survives the journey through the digestive tract to support gut balance. Paired with prebiotic fibers from wholesome vegetables, this food helps maintain steady energy and firm stools. The kibble size is appropriately small for medium breed puppies, encouraging proper chewing without frustration.
For pet parents who want a grain-free recipe with a clean ingredient profile and measurable health benefits, Nulo Freestyle is a standout choice. The transition is smooth for most puppies, and the high protein content supports lean muscle development during those critical early months.
Why we love it
- Real deboned salmon is the first ingredient — no poultry or egg protein
- BC30 probiotics survive stomach acid to reach the gut
- DHA from salmon supports vision and cognitive function
- No grains, corn, wheat, or artificial preservatives
Good to know
- Some picky puppies may need a gradual transition to accept the fish flavor
- Not suitable for puppies with fish allergies
- Premium pricing compared to grocery-store brands
2. Bil-Jac Puppy Select Dry Dog Food — Fresh Chicken
Bil-Jac takes a different approach by using 12 pounds of fresh chicken in every 15-pound bag, then slow-cooking the kibble through a proprietary Nutri-Lock process that breaks down complex carbohydrates for easier digestion. This makes it an excellent option for medium breed puppies with sensitive stomachs or those transitioning from a breeder’s diet.
The Smart Defense system fortifies the formula with vitamins C and E to support a developing immune system during the vulnerable puppy stage. Unlike many commercial brands, Bil-Jac does not spray rendered fat on the outside of the kibble to fake flavor — the fresh chicken is cooked directly into each pellet. The mini-bite size works well for medium breed jaws, and the texture is noticeably less hard than typical kibble.
Breeders often recommend Bil-Jac because the digestibility reduces gastric upset and keeps stool quality consistent. The brand has been family-owned since 1947, and every batch is made in their own U.S. facilities. For puppies that struggle with other foods, this is a reliable, gentle option worth trying.
Why we love it
- 12 lbs of fresh chicken per bag — no rendered fat coating
- Nutri-Lock slow-cooking enhances digestibility
- Fortified with vitamins C and E for immune support
- Family-owned American heritage since 1947
Good to know
- Higher price point per pound than some competitors
- Kibble is softer, so it may not help with dental abrasion
- Only available in chicken flavor — limited variety
3. NutriSource Grain Free Dry Puppy Food — Turkey, Whitefish & Menhaden (12LB)
NutriSource delivers a thoughtfully blended protein profile — turkey, whitefish, and menhaden fish meal — that offers variety without relying on a single animal source. This is beneficial for medium breed puppies who may develop sensitivities to chicken or beef over time. The 12-pound bag provides a solid trial period to assess your pup’s response.
The Good 4 Life system includes prebiotics and probiotics specifically chosen to support gut health, along with balanced omega-3 and omega-6 fatty acids for a healthy coat and heart. L-carnitine, taurine, and choline chloride are added to promote cardiovascular function during rapid growth phases. The kibble is sized appropriately for small to medium jaws, and the formula meets AAFCO guidelines for all life stages.
NutriSource stands out for its commitment to rotational feeding — the brand encourages alternating between their protein options to maintain gut diversity and prevent food boredom. Owners report shinier coats, more consistent energy, and less scratching after switching to this grain-free recipe.
Why we love it
- Three-protein blend reduces risk of single-protein sensitivity
- Prebiotics and probiotics for active gut support
- Heart health supplements: taurine, L-carnitine, choline
- Grain-free with low-glycemic lentils
Good to know
- Fish content may not appeal to all puppies
- Higher price point reflects premium ingredient sourcing
- Some owners prefer a single-protein formula for allergen testing
4. Purina ONE Plus Healthy Puppy Formula — Chicken
Purina ONE Plus brings real chicken as the number one ingredient in a formula that balances affordability with solid nutritional science. The 31.1-pound bag offers exceptional value for medium breed puppies who go through food quickly. DHA from natural sources supports brain and vision development, while four antioxidant sources strengthen the immune system.
The SmartBlend combines crunchy kibble with tender meaty morsels, creating a texture contrast that keeps mealtime interesting. Omega-6 fatty acids nourish the skin and coat, and the formula is free from artificial flavors and preservatives. Every batch is made in Purina-owned U.S. facilities with zero fillers — every ingredient has a defined purpose in the recipe.
For families who want a nationally available, veterinarian-recommended brand that won’t break the budget, Purina ONE Plus delivers consistent quality. Owners report that puppies transition easily, maintain solid stools, and show good energy levels throughout the day.
Why we love it
- Real chicken is the first ingredient
- DHA from natural sources for brain development
- Four antioxidant sources for immune support
- Excellent value for the bag size
Good to know
- Contains grains — not suitable for grain-free diets
- Some owners note the kibble size is on the smaller side
- Includes chicken by-product meal as a secondary protein source
5. NutriSource Grain Free Dry Puppy Food — Turkey, Whitefish & Menhaden (4LB)
The 4-pound bag of NutriSource Grain Free offers the same premium turkey, whitefish, and menhaden fish meal recipe as the larger size, making it a perfect starter pack for pet parents who want to test the formula before buying in bulk. The limited ingredient profile appeals to those managing potential food sensitivities in their medium breed puppy.
This grain-free recipe relies on humane certified turkey and low-glycemic lentils to provide steady energy without blood sugar spikes. The Good 4 Life system supports digestive health through probiotics, and the omega fatty acid profile promotes healthy skin and a glossy coat. Breeders often recommend this brand because the holistic formulation meets AAFCO guidelines for growth without unnecessary additives.
Puppies tend to love the taste — one poodle owner noted their picky eater finished every bowl and had better stool consistency within a week. For anyone unsure about committing to a large bag, this 4-pound option provides a low-risk entry point into a proven grain-free formula.
Why we love it
- Same premium recipe as the larger bag — ideal for testing
- Humane certified turkey as a quality protein source
- Low-glycemic lentils for steady energy
- Grain-free with limited ingredients for sensitive pups
Good to know
- Small bag size requires frequent repurchasing
- Fish content may cause gas in some puppies
- Premium price per pound compared to grain-inclusive options
6. Merrick Premium Grain Free Dry Puppy Food — Texas Beef & Sweet Potato
Merrick puts real deboned Texas beef at the front of the ingredient list, providing a high-protein foundation that supports muscle development in growing medium breed puppies. The 4-pound bag offers an affordable way to introduce a grain-free, beef-based formula to your pup’s rotation without a large upfront investment.
The recipe delivers 70% of its protein from animal sources, with DHA for brain development and glucosamine plus chondroitin for healthy hips and joints — a critical consideration for medium breeds prone to joint stress. Omega-6 and omega-3 fatty acids nourish the skin and coat, and the formula is completely free from artificial colors, flavors, and preservatives. The smaller kibble size is designed for puppy jaws.
Owners report that their puppies eat enthusiastically and maintain firm, healthy stools on this food. One pet parent noted their German Shepherd puppy preferred the beef flavor over chicken-based alternatives and showed consistent energy levels throughout the day.
Why we love it
- Deboned beef is the first ingredient
- Glucosamine and chondroitin for joint health
- DHA supports brain and vision development
- No artificial colors, flavors, or preservatives
Good to know
- Some puppies may need extra time to adjust from chicken-based diets
- Small bag size means more frequent reordering
- Not suitable for puppies with beef protein sensitivities
7. Purina Puppy Chow High Protein — Real Beef
Purina Puppy Chow High Protein offers an entry-level price point that still delivers real beef as a primary protein source and DHA for brain development. The 4.4-pound bag is designed for convenience, and the formula includes the building blocks of nutrition to meet the unique needs of growing puppies, including key nutrients found in mother’s milk.
The tender and crunchy kibble combination provides texture variety that many puppies find appealing, and the Healthy Start Nutrition formula is highly digestible. While the ingredient list is simpler than premium competitors, the brand has decades of feeding trials behind its recipes, and many breeders use Puppy Chow as a reliable starter food during the early weeks of life.
For pet parents on a tight budget who still want a recognizable brand with DHA support and high protein, Purina Puppy Chow gets the job done. Owners note that puppies transition easily, enjoy the taste, and maintain good energy levels — though some recommend supplementing with fresh vegetables or eggs for complete nutrition.
Why we love it
- Real beef provides recognizable protein source
- DHA supports vision and brain development
- Tender and crunchy texture keeps mealtime interesting
- Widely available at a budget-friendly price point
Good to know
- Contains grains and by-products — not a limited ingredient formula
- Some owners feel it has more filler than premium brands
- Small bag size means frequent repurchasing for medium breeds
Safety & Care Tips
Transition Gradually Over 7 to 10 Days
Switching your medium breed puppy’s food abruptly can cause digestive upset, loose stools, and reluctance to eat. Start by mixing 25% of the new food with 75% of the current food, then increase the proportion every two days. Monitor stool consistency daily — if it becomes soft, pause the transition and give your pup’s system extra time to adapt.
Monitor Growth and Adjust Portions
Medium breed puppies grow at different rates depending on genetics and activity level. Weigh your pup weekly and compare against breed-specific growth charts. Adjust portion sizes based on body condition rather than the bag’s generic feeding guidelines. A lean puppy with a visible waistline is healthier than one carrying extra weight during development.
FAQ
What makes medium breed puppy food different from all-breed formulas?
How much should I feed my medium breed puppy each day?
When should I switch from puppy food to adult food?
Is grain-free puppy food better for medium breeds?
Final Thoughts: The Verdict
For most pet parents, the puppy food for medium breeds winner is the Nulo Freestyle Salmon & Peas because it combines high animal-based protein with proven probiotics and DHA at a mid-range price that balances quality and value. If you want a formula that’s extra gentle on sensitive stomachs, grab the Bil-Jac Puppy Select. And for budget-conscious families who still want real beef and DHA support, nothing beats the value of the Purina ONE Plus Healthy Puppy Formula.