Best Dog Food To Gain Weight For Your Boxer: Top Picks

James Vega | 05-02-2026

Boxers are energetic, athletic dogs that sometimes struggle to maintain or gain healthy weight, especially if they’re highly active, recovering from illness, or naturally lean. Underweight Boxers may face challenges with energy, muscle development, and overall wellbeing, making it important to find the right nutritional support.

This guide reviews the best dog food and supplements designed to help your Boxer gain weight safely. We cover a range of high-calorie foods, chews, powders, and liquids—explaining their benefits, ideal users, and what sets each apart. Whether your Boxer is a picky eater or needs targeted muscle support, you’ll find practical solutions here.

Editor's Choice
Bully Max High Protein Dry Dog Food
Bully Max High Protein Dry Dog Food
Premium Pick
OKKÖBI 11-in-1 Muscle Gain Chews
OKKÖBI 11-in-1 Muscle Gain Chews
Budget Pick
Miracle Vet High-Calorie Weight Gainer Gel
Miracle Vet High-Calorie Weight Gainer Gel

Top 10 Best Dog Food To Gain Weight For Your Boxer

We analyzed the top brands and best-selling products in the Best Dog Food To Gain Weight For Your Boxer category to bring you a carefully curated list of recommendations.

1. Bully Max Dog Weight Gainer Soft Chews

Best Calorie Boost Supplement
Bully Max Dog Weight Gainer Soft Chews
7.7

Bully Max

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When Boxers need an extra calorie boost without changing their main diet, soft chews can provide a convenient, tasty solution. These supplements are especially helpful for dogs who need quick energy or have trouble maintaining weight.

Bully Max Dog Weight Gainer Soft Chews deliver 1,500 calories per bag and are packed with probiotics, vitamins, and minerals. They’re a strong option for Boxers of any age, especially those who need a supplement that can double as a treat or food topper. These chews are also well-suited for owners who value ingredient quality and vet approval.

  • 1,500 calories per bag: High-calorie support for underweight or active dogs
  • 250 million CFUs probiotics: Promotes digestion and immune health
  • No added sugar, gluten, or artificial flavors: Clean ingredient profile for sensitive dogs

Compared to powders and liquids, these chews offer portability and ease of use, but may not provide as much flexibility in adjusting calorie intake for very large dogs.

Strength
  • High calorie per bag
  • Supports digestion and immunity
  • No artificial additives
  • Versatile as treat or topper
  • Vet-approved, made in USA
Weakness
  • Fixed calorie content per chew
  • Not a complete food

2. OKKÖBI 11-in-1 Muscle Gain Chews

Best for Muscle Support & Versatility
OKKÖBI 11-in-1 Muscle Gain Chews
9.5

OkkÖbi

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Boxers needing targeted muscle growth and recovery benefit from supplements that combine protein, amino acids, and natural energy boosters. Chews offer a convenient, treat-like way to deliver these nutrients.

OKKÖBI 11-in-1 Muscle Gain Chews are formulated with a blend of premium proteins, essential amino acids, and supportive botanicals. They’re ideal for Boxers who are underweight, highly active, or in need of muscle repair. These chews are especially useful for owners who prefer a supplement that doubles as a treat and covers multiple wellness needs.

  • Amino acid blend: Includes L-Arginine, L-Glutamine, L-Leucine, L-Isoleucine, and L-Valine for muscle growth and repair
  • Natural energy sources: Features ingredients like turmeric, ashwagandha, and wild Alaskan salmon oil for vitality
  • Vet-approved, all-breed formula: Safe for puppies, adults, and all dog sizes

Unlike single-purpose supplements, these chews focus on comprehensive muscle and energy support. The tradeoff is that calorie content per chew may be lower than some pure weight gainers.

Strength
  • Supports muscle and strength
  • Contains amino acids and botanicals
  • Tasty and easy to feed
  • All-breed and all-age friendly
  • Vet-approved formula
Weakness
  • Lower calories per serving
  • Not a complete meal replacement

3. Miracle Vet High-Calorie Weight Gainer Gel

Best for Picky Eaters & Multivitamin Support
Miracle Vet High-Calorie Weight Gainer Gel
9.1

Miracle Vet

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Some Boxers struggle with appetite or need extra calories due to age, illness, or recovery. A high-calorie gel supplement can help stimulate eating and provide essential nutrients in an easy-to-administer form.

Miracle Vet High-Calorie Weight Gainer Gel is packed with calories, omega-3 fish oil, and a full spectrum of vitamins and minerals. It's a strong option for Boxers who are picky eaters, seniors, or require additional nutritional support beyond regular food. This gel is especially useful for owners who want a supplement that can be mixed with food or given directly.

  • 29 vitamins and minerals: Supports overall health, muscle, and immune function
  • Omega-3 fish oil base: Promotes skin, coat, and heart health while adding calories
  • Appetite stimulant: Helps encourage eating in finicky or recovering dogs

Compared to powders and chews, this gel is easier to administer and more appealing to dogs with low appetite. The main tradeoff is that it’s a supplement, not a primary food source.

Strength
  • High in calories and nutrients
  • Easy to mix or feed directly
  • Supports skin and coat health
  • Appetite stimulating
  • Vet-reviewed and safe for all ages
Weakness
  • Not a stand-alone meal
  • May require frequent dosing

4. All American Canine Weight Gainer Powder

Best All-Natural Protein Powder
All American Canine Weight Gainer Powder
8.9

All American Canine

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Boxers needing fast, healthy weight gain often benefit from concentrated powders that can be added to regular meals. Powders are versatile and allow for precise calorie and nutrient adjustments.

All American Canine Weight Gainer Powder features a blend of beef broth protein, whey, flaxseed, and superfoods. It’s well-suited for owners who want an all-natural, additive-free supplement to boost calories, protein, and digestive support. This powder is ideal for Boxers who need extra energy and muscle support without artificial ingredients.

  • Beef and whey protein blend: Promotes muscle growth and recovery
  • Added probiotics and vitamins: Supports digestion and immune health
  • No artificial additives: Free from glycerin, artificial colors, and trans fats

Compared to chews or liquids, this powder offers more ingredient transparency and flexibility in dosing. The tradeoff is that it requires mixing and may not appeal to all dogs’ palates.

Strength
  • Natural ingredient profile
  • Supports joints and digestion
  • Flexible dosing
  • Made in the USA
  • No artificial additives
Weakness
  • Requires mixing with food
  • Taste may not suit all dogs

5. All American Canine Weight Gainer Liquid

Best Oil-Based Calorie Booster
All American Canine Weight Gainer Liquid
8.7

All American Canine

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For Boxers needing a quick calorie boost, especially those with dry skin or joint concerns, oil-based liquid supplements can provide concentrated nutrition and support overall health.

All American Canine Weight Gainer Liquid combines salmon, coconut, avocado, flaxseed, and olive oils to deliver dense calories and omega fatty acids. This supplement is best for Boxers who benefit from added healthy fats and need a palatable, easy-to-mix option. It’s especially useful for dogs with sensitive digestion or those who dislike powders.

  • Blend of pure oils: Supplies concentrated calories and supports skin, coat, and joint health
  • No fillers or artificial flavors: All-natural formulation for sensitive dogs
  • Savory taste: Easily mixed into meals to encourage eating

Compared to powders and chews, this liquid prioritizes calorie density from fats and ease of mixing. The tradeoff is that it may not provide as much protein or vitamins as other supplement types.

Strength
  • High in healthy fats
  • Easy to mix with food
  • Supports coat and joints
  • No artificial ingredients
  • Made in the USA
Weakness
  • Lower protein content
  • May not suit dogs with fat sensitivities

6. OKKÖBI 11-in-1 Muscle Gain Chews (Alt)

Best for Daily Wellness Support
OKKÖBI 11-in-1 Muscle Gain Chews (Alt)
8.5

OkkÖbi

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Maintaining muscle and energy in Boxers requires ongoing nutritional support, especially for active or underweight dogs. Daily chews can make supplementation simple and enjoyable.

This version of OKKÖBI 11-in-1 Muscle Gain Chews offers a similar blend of proteins, amino acids, and botanicals as its counterpart, focusing on daily use for muscle and vitality. It’s best for owners looking for a routine supplement that covers multiple health bases in a tasty, treat-like form.

  • Comprehensive amino acid profile: Supports muscle repair and growth
  • Natural energy and wellness ingredients: Includes turmeric, ashwagandha, and salmon oil
  • Designed for all breeds and ages: Flexible for multi-dog households

Compared to single-purpose supplements, these chews provide broad-spectrum support but may not deliver as many calories per serving as dedicated weight gainers.

Strength
  • Covers multiple health needs
  • Easy daily supplementation
  • Palatable for most dogs
  • Vet input in formulation
  • Suitable for puppies and adults
Weakness
  • Lower calorie density
  • Not a meal replacement

7. All American Canine Weight Gainer Chews

Best Chewable High-Calorie Option
All American Canine Weight Gainer Chews
8.3

All American Canine

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Some Boxers prefer chewable supplements, which can make weight gain support more enjoyable and less stressful for both dog and owner. Chews are also easy to portion and serve.

All American Canine Weight Gainer Chews deliver high-calorie nutrition with added vitamins, probiotics, and muscle-supporting ingredients. They’re a good fit for Boxers who need extra calories but dislike powders or liquids. This option is especially practical for on-the-go feeding or as a reward during training.

  • High protein and fat content: Promotes rapid, healthy weight gain
  • Added probiotics and vitamins: Supports digestion and immune system
  • All-natural formulation: No artificial colors, glycerin, or trans fats

Compared to powders and liquids, these chews offer convenience and taste appeal, though they may not provide as much flexibility in dosing for very large or small dogs.

Strength
  • Easy to serve as treats
  • Supports digestion and immunity
  • No artificial additives
  • Made in the USA
  • Good for travel or training
Weakness
  • Fixed serving size
  • May not suit all palates

8. All American Canine Weight Gainer + Digestive Aid

Best for Digestive Health Focus
All American Canine Weight Gainer + Digestive Aid
8

All American Canine

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Boxers with sensitive digestion or those recovering from illness may need a supplement that supports both weight gain and gut health. Powders that blend protein with probiotics and digestive aids can be especially helpful.

All American Canine Weight Gainer + Digestive Aid combines high protein and fat content with pumpkin, beef liver, and a proprietary probiotic blend. It’s best for Boxers who need extra calories but also benefit from digestive support. This powder is ideal for dogs with sensitive stomachs or those transitioning to new diets.

  • 70% protein, 23% fat: High levels for muscle and energy
  • Probiotic and pumpkin blend: Promotes healthy digestion and nutrient absorption
  • All-natural, beef broth flavor: Encourages eating, even in picky dogs

Compared to other powders, this formula emphasizes digestive health alongside weight gain. The tradeoff is that it may require careful introduction for dogs new to high-protein diets.

Strength
  • High protein and fat
  • Supports gut health
  • Natural ingredients
  • Easy to mix with food
  • Appealing flavor for picky eaters
Weakness
  • May require gradual introduction
  • Powder format may be messy

9. Bully Max High Protein Dry Dog Food

Best Calorie-Dense Nutrition
Bully Max High Protein Dry Dog Food
9.8

Bully Max

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Maintaining a healthy weight in active Boxers can be challenging, especially for those with high energy needs or picky appetites. A calorie-dense, protein-rich dry food can make a significant difference in supporting muscle growth and overall vitality.

Bully Max High Protein Dry Dog Food stands out for its exceptionally high calorie content per cup and balanced blend of protein and fat. It's ideal for Boxers who need efficient weight gain, muscle support, and a formula free from common allergens. This option is especially well-suited for owners seeking a complete, all-in-one meal for dogs of any age or breed.

  • 535 calories per cup: Delivers more energy in smaller servings, reducing mealtime volume for picky eaters
  • 30% protein, 20% fat: Supports muscle development and sustained energy for active or underweight dogs
  • Free from corn, wheat, soy, by-products: Minimizes risk of food sensitivities and supports overall health

Compared to standard dry dog foods, Bully Max prioritizes calorie density and protein quality, making it a strong choice for rapid, healthy weight gain. The main tradeoff is that it may be richer than needed for dogs not requiring extra calories.

Strength
  • Very high calorie content
  • High protein and fat levels
  • Suitable for all life stages
  • No common allergens
  • Vet-approved and made in USA
Weakness
  • May be too rich for some dogs
  • Higher cost per serving

9. Bully Max High Protein Dry Dog Food

Best Calorie-Dense Nutrition
Bully Max High Protein Dry Dog Food
9.8

Bully Max

Check Price On Amazon

Maintaining a healthy weight in active Boxers can be challenging, especially for those with high energy needs or picky appetites. A calorie-dense, protein-rich dry food can make a significant difference in supporting muscle growth and overall vitality.

Bully Max High Protein Dry Dog Food stands out for its exceptionally high calorie content per cup and balanced blend of protein and fat. It's ideal for Boxers who need efficient weight gain, muscle support, and a formula free from common allergens. This option is especially well-suited for owners seeking a complete, all-in-one meal for dogs of any age or breed.

  • 535 calories per cup: Delivers more energy in smaller servings, reducing mealtime volume for picky eaters
  • 30% protein, 20% fat: Supports muscle development and sustained energy for active or underweight dogs
  • Free from corn, wheat, soy, by-products: Minimizes risk of food sensitivities and supports overall health

Compared to standard dry dog foods, Bully Max prioritizes calorie density and protein quality, making it a strong choice for rapid, healthy weight gain. The main tradeoff is that it may be richer than needed for dogs not requiring extra calories.

Strength
  • Very high calorie content
  • High protein and fat levels
  • Suitable for all life stages
  • No common allergens
  • Vet-approved and made in USA
Weakness
  • May be too rich for some dogs
  • Higher cost per serving

Buying Guide: How to Choose the Best Dog Food to Help Your Boxer Gain Weight

Selecting the right food or supplement to help your Boxer gain weight involves more than just picking the highest-calorie option. The category includes a range of products—dry foods, chews, powders, and liquids—each with unique benefits and tradeoffs. Buyers often misunderstand the difference between calorie density, protein quality, and the role of supplements versus complete meals.

Choosing Between Dry Food, Chews, Powders, and Liquids

The main decision is whether you want a complete meal, a supplement, or a flexible add-on. Dry foods like Bully Max High Protein offer all-in-one nutrition, while chews, powders, and liquids provide targeted support. Consider your dog's eating habits and your own routine when choosing a format.

Matching Protein and Calorie Needs to Your Boxer

Active or underweight Boxers need both high calories and quality protein to support muscle growth. Look for products with clear protein and fat percentages, and consider supplements if your main food isn't meeting all needs.

Digestive Health and Ingredient Sensitivities

Some Boxers have sensitive stomachs or food allergies. Products with added probiotics, pumpkin, or all-natural ingredients can help maintain digestive health and minimize reactions.

Administration and Daily Routine

Ease of use matters, especially if you need to supplement daily or have a picky eater. Chews and liquids are generally easier to administer, while powders offer more flexibility but may require mixing.

Final Buying Advice

Choosing the best dog food or supplement to help your Boxer gain weight comes down to matching your dog's specific needs with the right format and nutritional profile. Focus on calorie density, protein quality, and ingredient safety, and don't overlook the importance of digestive support.

FAQ For Dog Food To Gain Weight For Your Boxer

1. How do I know if my Boxer needs to gain weight?

Check with your veterinarian if your Boxer appears underweight, lacks energy, or has visible ribs and spine. A professional can help determine if weight gain is needed and safe.

2. Is it better to use a high-calorie dog food or a supplement?

High-calorie dog food provides complete nutrition and is best for ongoing feeding. Supplements are useful for targeted support or when your dog needs extra calories beyond their regular diet.

3. Are weight gainer chews or powders safe for all ages?

Most chews and powders reviewed here are suitable for puppies, adults, and seniors, but always follow the manufacturer's guidelines and consult your vet for specific age recommendations.

4. How quickly will my Boxer gain weight with these products?

Weight gain depends on your dog's metabolism, activity level, and overall health. Most dogs see gradual improvements over several weeks with consistent use and proper feeding.

5. Can I use multiple supplements at once?

It's best to use one main supplement at a time to avoid overfeeding or nutrient imbalances. Consult your veterinarian before combining products.

6. What should I do if my Boxer has a sensitive stomach?

Choose products with added probiotics, natural ingredients, and no artificial additives. Introduce new foods or supplements gradually to monitor for any digestive upset.

James Vega

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