Can you feel your dog’s ribs a little too easily? Putting weight back on the healthy way takes the right food.
A dog that loses weight despite regular meals could be dealing with any number of things, so the fix is rarely just bigger portions.
What you actually want is calorie density and protein working together. A food like Bully Max packs both in to build lean muscle, not just fat.
This guide covers ten dog foods for weight gain, both dry and wet. Here are the picks.
Our 10 Favorite Dog Foods For Weight Gain
Each pick delivers solid calories and protein so a thin dog can put on weight without upsetting a delicate stomach.
Some of these formulas are rich enough for the hardest cases, while others work well for picky eaters. Both dry and wet foods made the cut.
Quick Comparison Chart
| # | Product | Our Rating | ||
|---|---|---|---|---|
| 1 |  |
Taste of the Wild High Prairie Dry Dog Food | ★★★★★ | Check Price |
| 2 |  |
Bully Max High-Performance Dog Food | ★★★★★ | Check Price |
| 3 |  |
Maximum Bully Elite K9 Chicken and Pork Dog Food | ★★★★★ | Check Price |
| 4 |  |
Nature's Logic Dry Dog Food | ★★★★☆ | Check Price |
| 5 |  |
Instinct Original Grain-Free Dry Dog Food | ★★★★☆ | Check Price |
| 6 |  |
Wellness Complete Health Chicken and Oatmeal Dog Food | ★★★★☆ | Check Price |
| 7 |  |
Merrick Grain-Free Dry Dog Food | ★★★★☆ | Check Price |
| 8 |  |
Purina Pro Plan Sensitive Skin and Stomach Dog Food | ★★★★☆ | Check Price |
| 9 |  |
CRAVE Grain Free High Protein Dry Dog Food | ★★★★☆ | Check Price |
| 10 |  |
Cesar Classic Loaf Wet Dog Food Variety Pack | ★★★★☆ | Check Price |
1. Taste of the Wild High Prairie Dry Dog Food
A grain-free recipe built around roasted bison and venison with 32% protein to support lean muscle gain. Proprietary K9 strain probiotics and antioxidants from real fruits round out every serving.
Pros
- Real roasted bison and venison as primary proteins
- Proprietary K9 strain probiotics support digestion and immunity
- Antioxidants from blueberries, raspberries, and tomatoes
- Omega fatty acids for healthy skin and coat
- No corn, wheat, soy, artificial colors, or preservatives
Cons
- Grain-free formula flagged in FDA DCM investigation alongside other pea-based foods
- Some dogs experience digestive upset during the transition period
- No dedicated senior or weight-management recipe available
Taste of the Wild has a range of recipes, but the High Prairie formula is the one most recommended for weight gain. The roasted bison and venison provide both protein and calories in a form dogs find genuinely appealing.
Beyond the protein, the formula covers its nutritional bases well. Peas, chickpeas, and sweet potatoes bring fiber for digestion, while raspberries, blueberries, and tomatoes add antioxidants to support the immune system.
Canola oil contributes omega-3 fatty acids for skin and coat, and the company’s proprietary K9 strain probiotics round things out by supporting digestion and immunity. It’s grain-free with no corn, wheat, soy, or artificial colors or preservatives, which keeps the ingredient list clean.
2. Bully Max High-Performance Dog Food
A 30/20 high-protein formula delivering 535 calories per cup for serious muscle and weight gain. Chicken meal and white fish provide dense protein while beet pulp and flaxseed add fiber and omega fatty acids.
Pros
- 30% protein and 20% fat supports rapid lean muscle growth
- 535 calories per cup means smaller serving sizes needed
- Menhaden fish oil provides EPA and DHA omega-3 fatty acids
- Free from corn, wheat, soy, by-products, and artificial additives
- Zero recalls and made in the USA
Cons
- Higher price point than most mainstream dog foods
- Some dogs with sensitive stomachs didn't tolerate the rich formula well
- Customer service responsiveness has drawn complaints from some buyers
Bully Max is the pick to reach for if you need serious muscle and weight gain. It meets AAFCO nutrient guidelines and delivers 535 calories per cup, so you don’t need to pour a mountain of food into the bowl to hit calorie targets.
Chicken meat, chicken fat, and menhaden fish meal form the protein backbone. The menhaden oil is a good source of EPA and DHA omega-3 fatty acids, while whole ground flaxseed and beet pulp add fiber to keep digestion moving.
Brown rice, ground sorghum, and pearled barley supply carbohydrates along with additional fiber, antioxidants, and nutrients. The formula also includes brewer yeast, which is nutrient-dense, though if your dog has known sensitivities it’s worth checking with a vet first.
It does run on the pricier side, but the calorie density means a bag lasts.
3. Maximum Bully Elite K9 Chicken and Pork Dog Food
Chicken meal and pork meal concentrates deliver 32% protein and 481 calories per cup to pack on muscle fast. Flaxseed meal and fish meal add omega fatty acids while beet pulp and oatmeal support digestion.
Pros
- Chicken and pork meal concentrates provide roughly 300% more protein than fresh meat
- Omega-6 fatty acids from chicken fat support healthy skin and coat
- Peas, rice bran, and oatmeal deliver soluble dietary fiber
- Flaxseed and fish meal add omega-3 fatty acids
- Gluten-free formula reduces risk of obesity
Cons
- Contains brewers yeast which can trigger allergies in sensitive dogs
- Beet pulp is a controversial ingredient some owners prefer to avoid
- Inconsistent kibble size between batches reported by some buyers
Maximum Bully Elite K9 is another high-protein dry food built for dogs that need to put on real mass. The primary proteins are chicken meal and pork meal, both of which are concentrates with roughly 300% more protein than fresh meat, delivering 32% protein and 481 calories per cup.
Chicken fat adds omega-6 fatty acids for skin and coat, while peas, white rice, rice bran, oatmeal, and beet pulp supply soluble dietary fibers along with vitamins and nutrients. Flaxseed meal and fish meal round out the omega-3 side.
Brewer yeast is in there too, providing additional nutrients and vitamins that support bone structure and mobility. If your dog has any yeast sensitivities it’s worth running past a vet first, though this applies to any formula containing it.
The gluten-free formula also keeps the calorie gain in the lean category rather than tipping into unnecessary fat.
4. Nature’s Logic Dry Dog Food
A 100% natural recipe with 36% protein from chicken meal and turkey meal and zero synthetic vitamins or minerals. Montmorillonite clay and chicory root help control digestion and promote healthy gut bacteria.
Pros
- No man-made synthetic vitamins, minerals, or amino acids
- Chicken and turkey meal combine for a dense protein base
- Chicory root acts as a prebiotic for healthy gut bacteria
- Montmorillonite clay helps control diarrhea and IBS
- Hypoallergenic millet with omega-6 fatty acids from pumpkin seeds
Cons
- Small bag sizes make it costly for large or multi-dog households
- Some recipes have a strong odor that bothers certain owners
- Company relies on supplier spec sheets rather than independent ingredient testing
Nature’s Logic stands out for what it leaves out: no synthetic vitamins, minerals, or amino acids anywhere in the formula. It comes in several flavors including chicken, beef, duck, salmon, and rabbit, and the chicken version reviewed here hits 36% protein from chicken meal and turkey meal combined.
For produce, millet makes the food hypoallergenic and is rich in vitamins and fibers, while pumpkin seeds contribute omega-6 fatty acids, vitamins, and minerals. Together they support digestion, skin, coat, and reduced inflammation.
Two ingredients worth calling out are montmorillonite clay, which helps control diarrhea and IBS, and chicory root, which is loaded with soluble dietary fiber and acts as a prebiotic to promote healthy gut bacteria. It’s also gluten-free, which is a plus if you’re keeping the diet clean.
5. Instinct Original Grain-Free Dry Dog Food
Cage-free chicken kibble coated in freeze-dried raw for enhanced flavor and nutrition. With 70% animal ingredients and guaranteed live probiotics, it supports lean muscle, healthy digestion, and strong immunity.
Pros
- Freeze-dried raw coating preserves natural enzymes and nutrients
- 70% animal ingredients and oils for high bioavailable protein
- Guaranteed live probiotics support digestive and immune health
- Natural omegas nourish skin and coat
- Free from grain, potato, corn, wheat, soy, and by-product meal
Cons
- Higher calorie density at around 500 calories per cup can lead to overfeeding
- Some dogs experience digestive upset from the high-protein chicken base
- Price is higher than most standard kibble brands
Instinct Original is a grain-free dry food that takes a different approach: each kibble is coated in freeze-dried raw. Freeze-drying keeps natural flavors, antioxidants, amino acids, vitamins, and minerals intact in a way that standard processing can’t, and the moisture-free format stores easily.
The formula is built around cage-free chicken as the primary ingredient, with chicken meal adding a concentrated protein punch. Overall it delivers 70% real animal ingredients and oils alongside 30% fruits and vegetables, which is a solid ratio for lean muscle support and high bioavailable protein.
Guaranteed live probiotics, natural omega fatty acids, and antioxidants round out the nutrition picture. It’s free from grain, potato, corn, wheat, soy, and by-product meal.
Dogs tend to love the raw coating, which also helps picky eaters come around.
6. Wellness Complete Health Chicken and Oatmeal Dog Food
A wholesome grain-inclusive recipe with deboned chicken, oatmeal, and brown rice delivering balanced protein, fiber, and omega fatty acids. Added probiotics, taurine, and glucosamine round out the formula.
Pros
- Deboned chicken as the first ingredient for quality protein
- Taurine supports healthy heart function
- Glucosamine and chondroitin for strong joints
- Probiotics for a healthy digestive system
- No corn, wheat, soy, by-products, or artificial preservatives
Cons
- Higher carbohydrate content at around 43% dry matter compared to some rivals
- Some dogs experienced digestive upset even with a gradual food transition
- A few buyers reported bug or contamination issues inside sealed bags
Wellness Complete Health takes a more balanced approach than the pure muscle-builders on this list, which makes it a good fit for dogs that need to gain weight but don’t need an aggressive high-calorie push. Deboned chicken and chicken meal lead the protein lineup, with ground brown rice, barley, peas, and oats supplying carbohydrates, fiber, and nutrients.
One standout is taurine for heart health, which is worth noting given the ongoing attention to cardiac health in dog food discussions. Probiotics and prebiotics support digestion on the other end.
Omega fatty acids come from flaxseed and salmon oil, and natural ingredients like broccoli, kale, and spinach fill in the micronutrient gaps. It’s a clean, well-rounded formula without corn, wheat, soy, by-products, or artificial preservatives.
7. Merrick Grain-Free Dry Dog Food
Real deboned chicken is the first ingredient in this grain-free recipe with a 70:30 protein-to-produce ratio. Industry-leading glucosamine and chondroitin levels support hip and joint health alongside omega fatty acids.
Pros
- Deboned chicken as the first ingredient
- Leading levels of glucosamine and chondroitin for healthy hips and joints
- Omega-6 and omega-3 fatty acids support healthy skin and coat
- Fresh produce like blueberries, peas, and sweet potatoes for balanced nutrition
- Free from preservatives, fillers, corn, wheat, soy, or gluten
Cons
- Grain-free pea content has been associated with potential heart health concerns in some studies
- Rich formula can cause loose stools in dogs not gradually transitioned
- Higher price point than budget grain-free alternatives
Merrick Grain-Free is a solid option if you want quality ingredients without spending at the top of the market. Deboned chicken leads the formula, and the 70:30 protein-to-produce ratio means dogs tend to eat it with enthusiasm.
Fresh produce including blueberries, peas, and sweet potatoes delivers omega-3 and omega-6 fatty acids for healthy skin and coat, while glucosamine and chondroitin are added at industry-leading levels to support hip and joint health. That joint focus makes it a good choice for larger breeds trying to put on weight.
The formula is free from preservatives, fillers, corn, wheat, soy, and gluten. It doesn’t match Taste of the Wild or Bully Max on raw calorie density, but it’s a capable everyday formula that covers all the nutritional bases.
8. Purina Pro Plan Sensitive Skin and Stomach Dog Food
Salmon and rice formula with live probiotics designed for dogs with digestive sensitivities and skin issues. Sunflower oil delivers omega-6 fatty acids for a healthy coat while oatmeal keeps digestion gentle.
Pros
- Real salmon as the first ingredient for quality protein
- Fortified with guaranteed live probiotics for digestive and immune health
- Sunflower oil rich in omega-6 fatty acids for healthy skin and coat
- Oatmeal is easily digestible and gentle on sensitive stomachs
- Widely recommended by breeders and veterinarians
Cons
- Some dogs refused the food or lost interest after a few bowls
- A few owners reported vomiting or diarrhea during the adjustment period
- Bags are only available in limited sizes on some platforms
Purina Pro Plan’s Sensitive Skin and Stomach formula is the pick for dogs that need to gain weight but have a stomach that doesn’t handle rich food well. Real salmon leads the ingredient list, and it’s great for digestion with rice and oatmeal providing gentle, easily digestible carbohydrates.
Prebiotic fibers activate beneficial bacteria in the intestine, and guaranteed live probiotics support both digestion and immunity. Fish oil provides omega-3 and omega-6 fatty acids for joints and coat, while sunflower oil adds additional omega-6.
Zinc supports healthy skin, and many breeders and vets recommend this formula by name. It’s one of the more affordable options on this list, which makes it easier to stick with long-term during a weight-gain program.
9. CRAVE Grain Free High Protein Dry Dog Food
A high-protein beef recipe with 34% protein sourced from real meat rather than concentrates for more calories and sustained energy. Peas and chickpeas add fiber while chicken fat and fish oil deliver omega fatty acids.
Pros
- 34% protein from real beef for lean muscle support
- Chicken fat and fish oil provide omega-6 fatty acids for healthy skin
- Selenium yeast supports antioxidant and immune function
- Peas and beet pulp deliver dietary fiber for digestion
- Free from by-product meal, soy, corn, wheat, and artificial additives
Cons
- Some dogs developed allergy symptoms including ear infections and excessive shedding
- A few owners reported loose or bloody stools during the adjustment period
- Lacks added probiotics and uses non-chelated minerals
CRAVE delivers 34% protein from real beef rather than concentrates, which provides more calories and sustained energy than a meal-based formula at the same protein percentage. The beef-based recipe is the focus here, though it also comes in chicken, turkey, lamb, and salmon varieties.
Peas, chickpeas, dried potatoes, and beet pulp supply fiber to keep digestion healthy, and chicken fat along with fish oil are solid sources of omega-6 fatty acids for skin and coat. Selenium yeast is a notable addition that supports antioxidant and immune function.
The formula is free from by-product meal, soy, corn, wheat, and artificial additives. It’s a relative newcomer compared to options like Bully Max or Taste of the Wild, but it’s earned a solid following among owners looking for a real-meat grain-free option at a reasonable price.
10. Cesar Classic Loaf Wet Dog Food Variety Pack
A 36-tray variety pack of slow-cooked loaf recipes featuring real poultry as the first ingredient. Easy-peel single-serve trays make portioning simple and the food works as a standalone meal or a dry-food topper.
Pros
- Real poultry is the first ingredient across all varieties
- 36 individual single-serve trays reduce waste and simplify portioning
- Slow-cooked for a juicy, tender texture most dogs find palatable
- Works as a standalone meal or mixed with dry kibble
- No fillers, added sugar, or artificial flavors
Cons
- Contains carrageenan and sodium nitrite which are controversial additives
- Some dogs refuse it or only eat it when very hungry
- Lower overall nutritional density compared to high-protein dry foods
Cesar rounds out the list as the wet food pick, which is useful when you need to mix something palatable into dry kibble or serve a standalone meal for a dog that’s gone off regular food. The variety pack covers flavors like beef, chicken, steak and chicken, and classic home delights so you can rotate and hold a picky dog’s interest.
Real poultry is the first ingredient across all varieties. Beef contributes amino acids to support the digestive system and helps with weight gain, while chicken adds muscle-building protein with a lean fat profile, along with minerals and B vitamins.
Water and chicken broth keep the texture moist without adding much nutritional value.
Magnesium, a chelated mineral, is included to round out the nutrition. The one real downside is that the formula contains carrageenan and sodium nitrite, which are controversial additives worth knowing about.
It comes in easy peel-off single-serve trays, which makes portioning simple.
Final Thoughts
Helping an underweight dog gain in a healthy way takes patience, the right calorie-dense formula, and a gradual approach so you don’t overwhelm their digestive system. Taste of the Wild High Prairie is the top pick here because it delivers high protein and fat from quality animal sources without padding the numbers with empty fillers.
The options on this list have been tried and tested by dog owners working through the same challenge, so there’s real-world experience behind each recommendation. Whatever formula you land on, increase portions slowly over one to two weeks rather than jumping straight to a larger serving.
If your dog isn’t gaining weight despite a calorie-appropriate diet, a vet visit is worth scheduling. Parasites, metabolic issues, and dental pain can all quietly prevent weight gain, and ruling those out first means you’re not just guessing at the bowl.
Once your dog reaches a healthy weight, the goal shifts to maintaining it, which usually means pulling back slightly on portion size and checking in with your vet annually.
