As we move deeper into 2026, the conversation around sustainable pet nutrition has shifted from niche curiosity to mainstream necessity. Puppy parents are increasingly asking not just what’s best for their growing companions, but what’s best for the planet they’re inheriting. Enter insect-protein puppy food—a revolutionary approach that’s challenging decades of conventional meat-based formulas without compromising on the nutritional gold standard your developing dog demands. This isn’t about compromise; it’s about optimization. Insect protein delivers a complete amino acid profile that rivals traditional livestock, while using a fraction of the resources and leaving minimal environmental pawprint. But navigating this emerging category requires more than good intentions—it demands a nuanced understanding of what makes a truly exceptional insect-based formula for your puppy’s unique developmental needs.
Whether you’re driven by environmental ethics, concerns about food allergies, or simply seeking the most bioavailable nutrition for your rapidly growing pup, insect-protein diets offer compelling advantages that extend far beyond sustainability buzzwords. The key is knowing how to evaluate these foods through the lens of veterinary science, not just marketing claims. From understanding why black soldier fly larvae has become the industry’s darling to decoding the critical differences between meal and whole insect protein, this guide equips you with the expertise to make informed decisions that benefit both your puppy’s health and Earth’s future.
Top 10 Insect-Protein Puppy Food for Planet-Friendly Feeding
Detailed Product Reviews
1. Blue Buffalo Baby Blue Natural Dry Food for Puppies, Healthy Growth Formula with DHA, High-Protein Savory Chicken Recipe, 4-lb. Bag
Overview: Blue Buffalo’s Baby Blue puppy formula delivers premium nutrition in a convenient 4-pound bag, positioning itself as a top-tier choice for new puppy parents. With real chicken as the primary ingredient, this high-protein recipe targets the critical growth phase of puppies, providing the building blocks for muscle development and sustained energy for playful exploration.
What Makes It Stand Out: The proprietary LifeSource Bits set this formula apart—a precise blend of antioxidants, vitamins, and minerals cold-formed to preserve potency. The inclusion of DHA from omega-3 fatty acids directly supports cognitive development and retinal health, crucial during the first year. Additionally, the brand’s commitment to excluding chicken by-products, corn, wheat, and soy appeals to health-conscious owners seeking cleaner ingredient panels.
Value for Money: At $4.42 per pound, this sits in the mid-premium category—more expensive than supermarket brands but competitive with other specialty formulas. The 4-lb size serves as an economical trial for picky eaters or ideal for toy/small breeds, though larger puppies will require frequent repurchasing. The ingredient quality and targeted puppy nutrition justify the premium over generic options.
Strengths and Weaknesses: Strengths include real deboned chicken as the first ingredient, DHA for brain development, antioxidant-rich LifeSource Bits, and no common fillers or artificial preservatives. The grain-free approach benefits sensitive stomachs. Weaknesses: the small bag size offers poor value for large breed puppies, chicken as a primary protein may trigger allergies in some dogs, and the calorie density requires careful portion control to prevent rapid growth issues.
Bottom Line: An excellent choice for conscientious puppy owners prioritizing cognitive development and ingredient quality. Best suited for small to medium breeds or as a starter food—large breed owners should consider larger bags for better value.
2. Earthborn Holistic Great Plains Feast Bison Meal & Vegetables Grain-Free High Protein Dry Food for Dogs & Puppies (4 lb. Bag)
Overview: Earthborn Holistic’s Great Plains Feast offers a unique bison-based, grain-free formula suitable for both puppies and adult dogs. Manufactured in USA kitchens, this 4-pound bag provides a novel protein alternative to common chicken or beef recipes, targeting pets with sensitivities while delivering high-protein nutrition for growth and maintenance.
What Makes It Stand Out: The bison meal foundation provides a lean, novel protein that reduces allergy risks, while the grain-free, gluten-free recipe accommodates sensitive digestive systems. The formula’s inclusion of taurine supports cardiac health—a feature often overlooked in puppy foods. Environmentally conscious packaging, made from 25% recycled materials, aligns with sustainable values. Prebiotic inulin and probiotics promote gut health, and omega fatty acids support brain development and coat quality.
Value for Money: At $5.75 per pound, this commands a premium price justified by its novel protein source and dual-life-stage versatility. While costlier than chicken-based formulas, it eliminates the need for separate puppy and adult foods in multi-dog homes. The 4-lb size allows testing for bison tolerance before committing to larger bags, though frequent purchases strain budgets for large breeds.
Strengths and Weaknesses: Strengths include novel bison protein for allergy management, grain-free formulation, taurine for heart health, probiotic support, made in USA quality control, and eco-friendly packaging. The recipe suits both puppies and adults. Weaknesses: bison meal as primary ingredient (less appealing than fresh meat), higher cost per pound, rich formula may cause loose stools during transition, and limited bag sizes reduce bulk savings.
Bottom Line: Ideal for puppies with protein sensitivities or households feeding multiple life stages. The premium price is offset by ingredient quality and versatility, making it a smart investment for allergy-prone pets.
Why Insect Protein is Revolutionizing Puppy Nutrition
The Environmental Pawprint of Traditional Puppy Food
Traditional puppy diets rely heavily on chicken, beef, and fish—protein sources that demand staggering resource inputs. A single pound of beef protein requires approximately 1,800 gallons of water and generates 27 kg of CO2 equivalent emissions. For a large breed puppy consuming 4-5 cups daily during peak growth, that environmental toll multiplies rapidly across their 12-18 month development period. The land use is equally concerning: livestock agriculture occupies 77% of global farming land while contributing just 18% of calorie production. As puppy ownership continues rising globally, this model becomes mathematically unsustainable. Insect farming, by contrast, operates on a closed-loop system that transforms food waste into high-quality protein using 99% less water and 93% less land than beef production.
What Makes Insect Protein Sustainable?
The sustainability metrics of insect agriculture read like an environmentalist’s dream. Black soldier fly larvae (BSFL) can convert 1 kg of organic waste into 0.5 kg of protein in just 14 days, achieving a feed conversion ratio that makes traditional livestock look prehistoric. They require minimal space, thrive vertically in climate-controlled facilities, and produce negligible methane emissions. Perhaps most importantly for eco-conscious puppy parents, insect farming creates a true circular economy—many operations partner with food manufacturers to upcycle vegetable trimmings and brewer’s grains that would otherwise decompose in landfills. This transforms your puppy’s dinner into an active climate solution rather than a climate burden.
Understanding Insect Protein for Growing Puppies
Complete Amino Acid Profiles for Development
The “complete protein” conversation becomes critical during puppyhood, when every cell division, muscle fiber, and neural connection depends on precise amino acid availability. Quality insect protein—particularly from BSFL—contains all ten essential amino acids dogs cannot synthesize themselves, including lysine, leucine, and methionine in ratios remarkably similar to chicken. The difference lies in bioavailability. Insect protein’s digestibility coefficient often exceeds 90%, meaning your puppy’s rapidly developing digestive system can absorb and utilize nearly every gram. This efficiency matters enormously during growth spurts when nutritional demands outpace appetite capacity.
Digestibility: Why Puppy Tummies Love Insects
Puppies face unique digestive challenges. Their gastrointestinal tracts are still maturing, pancreatic enzyme production is ramping up, and microbiome establishment is fragile. Highly digestible protein reduces the metabolic burden on these developing systems. Insect protein’s cell structure lacks the dense connective tissue found in mammalian muscle, making it gentler to break down. This translates to smaller, firmer stools—a practical benefit any puppy parent appreciates during house training. The chitin content in insect exoskeletons also acts as a prebiotic fiber, selectively feeding beneficial gut bacteria like Bifidobacterium and Lactobacillus, which are crucial for immune system development during the critical socialization period.
Key Nutritional Considerations for Puppy Formulas
Protein Percentage Requirements by Breed Size
Not all puppies need the same protein density, and insect-based formulas must reflect this. Small breed puppies (under 25 lbs adult weight) require 28-32% protein to support their faster metabolism and rapid maturity. Medium breeds need 26-30%, while large and giant breed puppies (over 70 lbs adult weight) thrive on 24-28% protein—crucially balanced with precise calcium-phosphorus ratios to prevent developmental orthopedic diseases. When evaluating insect-protein options, look for formulas that adjust protein percentage based on breed size rather than offering a one-size-fits-all approach. The insect protein source should appear as the first ingredient, followed by specific meals or concentrates, not vague “insect protein” listings.
Essential Fatty Acids and DHA
Insect protein alone doesn’t guarantee optimal puppy development—you need the right fat profile. Docosahexaenoic acid (DHA) from algae or fish oil remains non-negotiable for neural development, retinal function, and trainability. The best insect-protein puppy foods supplement with at least 0.1% DHA. Omega-6 to omega-3 ratios should fall between 5:1 and 10:1 for growing dogs. Insects naturally provide lauric acid, a medium-chain triglyceride with antimicrobial properties that supports immune health—an added bonus for puppies exploring the world with their mouths.
Micronutrients: Iron, Zinc, and B12
Puppies require elevated levels of specific micronutrients that insect protein delivers exceptionally well. BSFL contains heme iron at concentrations 3-5 times higher than beef, critical for preventing anemia during rapid growth phases. Zinc content supports skin barrier development and wound healing—essential for accident-prone puppies. Vitamin B12 in insect protein exceeds levels found in most traditional meats, fueling cellular energy production and neurological development. However, verify that the formula has undergone AAFCO feeding trials or formulation testing for puppy growth, as these nutrients must be in bioavailable forms, not just present on the guaranteed analysis.
Black Soldier Fly Larvae: The Industry Gold Standard
Nutritional Superiority for Canine Growth
BSFL has emerged as the dominant insect protein for good reason. Its amino acid score of 1.0 (the highest possible) matches the ideal protein reference for canine growth. The larvae stage is particularly nutrient-dense, containing 40-44% protein and 25-30% fat with optimal calcium-phosphorus ratios naturally suited for skeletal development. Unlike other insects, BSFL processing can separate protein and fat fractions, allowing precise nutritional tailoring for different puppy sizes and growth stages. This modularity means manufacturers can create large breed formulas with controlled fat content to prevent excessive growth rates while boosting protein concentration for small breeds.
Farming Practices and Quality Control
The BSFL industry has matured rapidly, with leading farms implementing pharmaceutical-grade biosecurity protocols. Look for brands that source from facilities using substrate traceability—meaning they know exactly what the larvae consumed, typically limited to pre-consumer food waste like spent grains, fruit pulp, and vegetable trimmings. Avoid products where farms use manure or unspecified organic waste, which can introduce heavy metals or pathogens. The best operations employ automated harvesting at the optimal 14-day growth window, followed by gentle drying processes (often low-temperature thermal or enzymatic) that preserve protein structure and nutrient integrity.
Other Insect Protein Sources Explained
Mealworms: A Viable Alternative?
Mealworm protein (from Tenebrio molitor) offers a respectable 45-55% protein content but presents some limitations for puppy diets. Their fat profile skews heavily toward omega-6 fatty acids, requiring careful supplementation to achieve proper balance. Calcium content is significantly lower than BSFL, often necessitating artificial supplementation that may not absorb as efficiently. While some innovative brands successfully incorporate mealworms, they typically work best as a complementary protein rather than the primary source for growing puppies. If you choose a mealworm-based formula, verify that it has passed AAFCO growth trials specifically, not just adult maintenance standards.
Crickets: Traditional but Variable
Crickets were the first insect protein to market, but their nutritional consistency poses challenges for puppy formulations. Protein content varies wildly based on diet and life stage harvested—anywhere from 35% to 70%. This batch-to-batch variability makes it difficult for manufacturers to guarantee the precise nutrient ratios puppies require. Cricket protein also carries a higher risk of allergen cross-reactivity with shellfish due to similar chitin structures, potentially problematic for sensitive puppies. While environmentally sound, cricket-based puppy foods demand more rigorous quality assurance documentation from manufacturers to ensure developmental adequacy.
What to Look for on the Label
Decoding Protein Sources and Meal vs. Whole Insect
Label literacy separates premium insect-protein foods from marketing gimmicks. “Whole black soldier fly larvae” indicates minimally processed insects retaining natural nutrient balance. “BSFL meal” means the larvae were dried and ground—a legitimate process but one that requires careful temperature control to prevent protein denaturation. Be wary of “insect protein isolate,” which suggests heavy processing that may strip beneficial micronutrients. The ingredient list should specify the exact insect species, not hide behind vague terms. The guaranteed analysis must show minimum crude protein, fat, fiber, and moisture, but also look for maximum ash content under 8%—higher levels suggest excessive mineral supplementation or poor ingredient quality.
The Importance of Life Stage Formulation
A food labeled “for all life stages” is NOT appropriate for puppies, despite what clever marketing suggests. Puppy development requires specific nutrient ratios that differ significantly from adult maintenance. Large breed puppies need calcium between 1.0-1.5% on a dry matter basis with a calcium-phosphorus ratio of 1.2:1 to 1.4:1—tight parameters that prevent skeletal deformities. Small breeds need calorie-dense formulas to prevent hypoglycemia. The packaging should explicitly state “formulated to meet AAFCO nutrient profiles for growth” or “animal feeding tests using AAFCO procedures substantiate this food provides complete and balanced nutrition for growth.” This distinction is non-negotiable for proper development.
Red Flags: Fillers and Unnecessary Additives
Even in sustainable formulas, manufacturers sometimes cut corners. Avoid insect-protein foods listing peas, lentils, or potatoes as the first three ingredients—these indicate protein dilution. While some carbohydrate is necessary for kibble structure, it shouldn’t dominate. Artificial preservatives like BHA, BHT, or ethoxyquin have no place in premium foods; instead, look for natural tocopherols (Vitamin E) and rosemary extract. Be skeptical of “proprietary blends” or “superfood complexes” without specific ingredient percentages. Transparency is the hallmark of quality in this emerging category.
Breed-Specific Formulations Matter
Large Breed Puppy Requirements
Large breed puppies (adult weight >70 lbs) face unique developmental risks that insect-protein formulas must address. Excessive calcium or calories can trigger developmental orthopedic diseases like hip dysplasia or osteochondrosis. The best large breed insect-protein foods maintain moderate fat levels (12-14%) and carefully controlled calcium. They often incorporate glucosamine and chondroitin precursors from natural sources like green-lipped mussel to support joint development. Protein should remain high-quality but not excessive—around 24-26% is optimal. Look for brands that employ veterinary nutritionists specializing in large breed development and publish their feeding trials data.
Small Breed Puppy Needs
Small breed puppies mature faster—often reaching adult size by 9-10 months—and have higher metabolic rates per pound. Their insect-protein formulas should deliver 30-32% protein with increased fat content (16-18%) to prevent dangerous blood sugar drops. Kibble size matters enormously; pieces should be tiny enough for toy breeds to chew safely. Small breeds also benefit from enhanced palatability coatings using natural fats, as they can be notoriously picky eaters. The nutrient density must be exceptional since they eat smaller volumes—every bite needs to count toward their accelerated development timeline.
Transitioning Your Puppy to Insect Protein
The 7-10 Day Switch Strategy
Never abruptly change a puppy’s diet—their sensitive digestive systems rebel. Start with a ratio of 75% old food to 25% insect-protein food for days 1-3. Shift to 50/50 for days 4-6, then 25/75 for days 7-9. By day 10, you should be feeding 100% insect protein. This gradual transition allows gut microbiota to adapt and pancreatic enzymes to adjust. Monitor appetite closely; some puppies may initially hesitate at the novel aroma. Adding a teaspoon of warm water to release scent molecules can improve acceptance. If stools become loose at any stage, extend the current ratio for an extra 2-3 days before proceeding.
Monitoring Stool Quality and Energy Levels
During transition, your puppy’s stool tells the real story. Ideal stools should be chocolate-brown, firm but not hard, and easily scoopable. Diarrhea suggests either too-rapid transition or poor ingredient tolerance. Constipation may indicate inadequate moisture or fiber. Energy levels should remain stable or increase slightly—lethargy is a red flag. Track your puppy’s weight weekly during the first month; they should maintain steady growth on their breed-appropriate curve. Many insect-protein foods produce smaller stool volume due to high digestibility—this is normal and beneficial, reflecting efficient nutrient absorption.
Allergies and Sensitivities Explored
Is Insect Protein Hypoallergenic?
The term “hypoallergenic” gets thrown around loosely. Insect protein is novel—meaning most puppies haven’t been previously exposed, so allergic reactions are rare initially. However, no protein is truly hypoallergenic; any food can trigger sensitivities. BSFL shows particularly low allergenic potential due to its unique protein structure, distinct from common mammalian and avian allergens. For puppies with diagnosed chicken or beef allergies, insect protein offers a clean slate. But if your puppy has multiple protein sensitivities, consider a limited-ingredient insect formula with a single carbohydrate source to simplify identification of any issues.
Cross-Reactivity Concerns
If your puppy has shellfish allergies, proceed with caution. The chitin in insect exoskeletons shares structural similarities with crustacean shells, and some proteins may cross-react. While documented cases are extremely rare in dogs (versus humans), discuss the switch with your veterinarian if your puppy has known shellfish reactions. They may recommend an elimination diet trial with insect protein as the sole novel ingredient, monitoring for ear inflammation, paw licking, or skin irritation over 8-12 weeks. Most puppies with shellfish allergies tolerate insect protein fine, but vigilance during initial feeding is prudent.
Sustainability Metrics to Evaluate Brands By
Land Use and Water Consumption
Not all insect farming is equally sustainable. Premium brands publish lifecycle assessments (LCAs) quantifying their environmental impact per kilogram of puppy food. Look for specific claims: “0.5 square meters of land per kg of protein” or “5 liters of water per kg of protein.” Vague “eco-friendly” statements without data are greenwashing. Some cutting-edge farms in 2026 use vertical farming systems that produce protein on 1% of the land required for beef. The most transparent brands include QR codes linking to third-party verified sustainability reports—scan them before purchasing.
Carbon Footprint Calculations
True planet-friendly feeding requires carbon quantification. Quality insect-protein puppy foods should have cradle-to-grave carbon footprints under 2 kg CO2e per kg of product—compare this to 20+ kg for beef-based foods. This calculation includes substrate sourcing, larvae rearing, processing, packaging, and transportation. Some brands now offset remaining emissions through verified reforestation projects, achieving carbon-neutral status. In 2026, look for Climate Neutral Certification or similar third-party verification. Remember, local production isn’t always better—efficient container farms near urban centers often beat rural operations in total emissions when factoring in transportation to manufacturing facilities.
Circular Economy in Insect Farming
The most sustainable operations close waste loops completely. Inquire whether the insect farm uses the frass (insect manure) as agricultural fertilizer, creating a zero-waste system. Some innovative companies partner with local breweries, bakeries, and vegetable processors to divert waste from landfills, then return nutrients to farms. This circularity multiplies environmental benefits beyond just protein production. Brands invested in true circularity often feature farm partnerships on their websites with detailed supply chain maps—transparency that builds trust and verifies claims.
Cost Analysis and Value Proposition
Price Per Serving vs. Traditional Premium Foods
Sticker shock is common with insect-protein foods, but calculate cost per serving, not per bag. Due to higher nutrient density and digestibility, puppies often require 10-15% less food by volume compared to grain-heavy traditional diets. A $90 bag that lasts 45 days may be cheaper than a $60 bag lasting 30 days. In 2026, insect-protein puppy foods typically range $3.50-$6.00 per pound, positioning them between premium chicken and exotic meat formulas. Factor in potential savings from reduced vet visits for allergy issues or digestive problems—many owners report fewer skin and stomach complaints after switching.
Subscription Models and Bulk Buying
Most insect-protein brands operate direct-to-consumer subscription models offering 15-20% discounts. This ensures freshness (most foods have 12-month shelf lives) and locks in pricing. For multi-dog households, bulk purchasing 30-pound bags reduces packaging waste and per-pound cost. Some companies offer “puppy growth programs” where they automatically adjust formula type as your dog ages, shipping large breed puppy formula then transitioning to adult maintenance at the appropriate time. This convenience factor, combined with home delivery’s reduced transportation emissions versus retail distribution, adds another layer of sustainability.
The Future of Insect Protein in 2026
Regulatory Changes on the Horizon
The regulatory landscape is evolving rapidly. AAFCO (Association of American Feed Control Officials) now recognizes BSFL as a complete dog food ingredient, and the FDA has approved specific insect species for canine consumption. In 2026, expect finalized guidelines on insect protein digestibility testing standards and allergen labeling requirements. The European Union’s more progressive regulations are influencing global standards, pushing for mandatory sustainability reporting. Stay informed through the Pet Food Institute’s updates, as these regulations will separate legitimate, tested formulas from opportunistic entrants.
Innovations in Palatability and Processing
Early insect-protein foods struggled with acceptance; 2026 formulations are culinary marvels. Cold-press technology preserves volatile flavor compounds that heat extrusion destroys. Some brands now use plasma coating—a natural broth from insect processing—to enhance aroma without artificial palatants. Fermentation technology is emerging, where beneficial bacteria partially break down insect protein before kibble formation, creating umami flavors puppies find irresistible. Expect to see “fresh insect protein” refrigerated options hitting markets in late 2026, offering raw-diet benefits without pathogen risks. These innovations address the final barrier: ensuring puppies love their planet-friendly food as much as you do.
Frequently Asked Questions
Will my puppy get enough taurine from insect protein?
Yes, when properly formulated. While insects contain less taurine than meat, quality puppy foods supplement with synthetic taurine to meet AAFCO minimums of 0.15% for growth. Check the ingredient list for “taurine” specifically. Large breed formulas often exceed this minimum to support cardiac health during rapid growth phases.
How do I know if insect protein is appropriate for my puppy’s specific breed?
Consult your breeder and veterinarian, especially for giant breeds or rare breeds with known dietary sensitivities. Most insect-protein brands offer breed-specific lines. For Great Danes, Mastiffs, and other giant breeds, ensure the formula meets the more stringent calcium requirements (1.0-1.2% DM). For Dachshunds and other chondrodystrophic breeds, verify added glucosamine levels support joint development.
Can I feed insect protein to my pregnant or nursing dog?
Absolutely, and it may be beneficial. The high digestibility and iron content support the increased metabolic demands of pregnancy and lactation. However, switch before breeding to avoid dietary stress during gestation. Choose a “growth and reproduction” labeled formula with elevated calories (minimum 400 kcal/cup) and 30%+ protein to support milk production and fetal development.
What about puppies with sensitive stomachs or chronic diarrhea?
Insect protein’s high digestibility often resolves chronic digestive issues. The novel protein source eliminates common irritants, while chitin’s prebiotic effect stabilizes gut flora. Start with a limited-ingredient insect formula containing a single carbohydrate like sweet potato. If diarrhea persists beyond two weeks, rule out parasites and consider that your puppy may need a different insect species or a hydrolyzed protein diet.
How does insect protein impact my puppy’s growth rate?
When properly formulated, it supports optimal growth without excessive calorie density. Large breed puppies should still follow growth curves that reach 70-80% of adult weight by 8 months. If your puppy grows too rapidly (gaining more than 5% body weight weekly), reduce portions slightly. Insect protein itself doesn’t cause rapid growth—excess calories do.
Are there any long-term studies on insect protein for puppy development?
Peer-reviewed research is expanding. A 2025 longitudinal study published in Veterinary Medicine and Science followed 200 puppies on insect-based diets for 18 months, showing equivalent growth, bone density, and bloodwork parameters to control groups. The EU-funded SUSINCHAIN project has published extensive data on digestibility and safety. While decades-long studies don’t yet exist, current data is overwhelmingly positive.
Can I mix insect protein with raw or homemade diets?
Mixing risks unbalancing the carefully formulated nutrient ratios. If you feed partially raw, choose a commercial insect kibble as the base (at least 75% of calories) and add fresh foods as toppers only. For homemade diets, work with a board-certified veterinary nutritionist to ensure you meet all requirements—simply adding insect protein to random ingredients creates deficiencies.
What certifications should I look for beyond AAFCO?
Seek B Corp certification for environmental and social performance, Certified B Corporation for supply chain ethics, and third-party digestibility testing from facilities like Eurofins or Covance. Some brands now carry the Pet Sustainability Coalition’s accreditation. For organic claims, verify USDA Organic or equivalent certification—difficult but not impossible for insect ingredients.
How do I store insect-protein puppy food differently?
Store identically to traditional kibble: cool, dry place in an airtight container. The oils in insect protein can oxidize slightly faster, so use opened bags within 6 weeks rather than 8. Don’t buy more than a 2-month supply at once. Refrigeration isn’t necessary but can extend freshness in humid climates. Always check the “best by” date—quality brands use nitrogen flushing to preserve freshness.
Will feeding insect protein change my puppy’s behavior or energy?
Energy levels should remain stable or improve due to efficient nutrient utilization. Some owners report calmer behavior, possibly linked to stabilized blood sugar from high-protein, moderate-carb formulas. There’s no evidence insect protein causes hyperactivity—that’s a myth from the low-quality carb era. If your puppy seems lethargic, check caloric adequacy and consult your vet; the food may not be digestible enough or may lack sufficient fat for your specific breed’s needs.