5 Best Dog Food For Underweight Dogs: Buyer’s Guide

Peter Armani | 22-12-2025

Helping an underweight dog reach a healthy weight can be challenging, especially when appetite or digestive issues are involved. The right dog food or supplement can make a noticeable difference, providing extra calories and nutrients in a form your dog will actually eat. Below, you’ll find options that focus on calorie density, ingredient quality, and ease of use, so you can choose what best fits your dog’s needs.

Editor's Choice
Bully Max Dog Weight Gainer Soft Chews
Bully Max Dog Weight Gainer Soft Chews
Premium Pick
Solid Gold Freeze Dried Dog Food with Beef & Superfoods
Solid Gold Freeze Dried Dog Food with Beef & Superfoods
Budget Pick
Blue Buffalo Life Protection Small Breed
Blue Buffalo Life Protection Small Breed

Top 5 Dog Food For Underweight Dogs

We researched and compared the top products in the Dog Food For Underweight Dogs category to provide you with these recommendations.

1. Bully Max Dog Weight Gainer Soft Chews

High Calorie Chews
Bully Max Dog Weight Gainer Soft Chews
9.8

Bully Max

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These soft chews have a dense, chewy texture and are easy to break apart for flexible portioning. They're often used as treats or toppers for dogs needing extra calories, fitting easily into daily routines. The formula is suitable for all ages and avoids artificial ingredients, appealing to those who prefer natural supplements.

What We Like:

  • Calorie-dense for weight gain
  • Includes probiotics for digestion
  • No artificial flavors or fillers
  • Suitable for puppies and adults
  • Can be used as treat or topper

What Could Be Improved:

  • Chew size may be large for very small dogs
  • Some dogs may prefer different flavors

2. Blue Buffalo Life Protection Small Breed

High Energy Support
Blue Buffalo Life Protection Small Breed
8.9

Blue Buffalo

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This dry dog food features small kibble and a blend designed for active small breeds. The formula uses real chicken and brown rice, omitting common fillers, and includes antioxidants for immune support. It's a practical option for Dachshunds with higher energy needs.

What We Like:

  • Real chicken as main ingredient
  • No corn, wheat, or soy
  • Antioxidant-rich blend
  • Supports immune health
  • Focused on small breed energy

What Could Be Improved:

  • May be rich for less active dogs
  • Limited flavor choices

3. Solid Gold Freeze Dried Dog Food with Beef & Superfoods

Freeze Dried Nutrition
Solid Gold Freeze Dried Dog Food with Beef & Superfoods
9.1

Solid Gold

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This freeze dried dog food offers a mix of real beef, organ meats, and superfoods like pumpkin, with a texture that can be served as a topper or treat. It's popular for picky eaters or dogs with sensitive stomachs, as it avoids grains and artificial additives. The formula is versatile and suitable for all sizes and ages.

What We Like:

  • High-protein freeze dried bites
  • Includes superfoods for digestion
  • No grains or fillers
  • Easy to serve as topper or treat
  • Suitable for all breeds

What Could Be Improved:

  • Texture may not appeal to all dogs
  • Requires careful storage to maintain freshness

4. Bully Max Liquid Weight Gainer for Dogs

Liquid Calorie Boost
Bully Max Liquid Weight Gainer for Dogs
8.9

Bully Max

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This liquid supplement blends whey protein and fish oil, offering a smooth texture that mixes easily into food or can be given directly. It's designed for dogs needing extra calories and nutrients, especially those who struggle with solid food. The formula is suitable for all ages and breeds, making it a flexible choice for many households.

What We Like:

  • Easy to mix into meals
  • Includes omega-3 and protein
  • Suitable for all ages
  • No known side effects when used as directed
  • Vet-reviewed for quality

What Could Be Improved:

  • May require gradual introduction for sensitive stomachs
  • Liquid format may be messy if spilled

5. Blue Buffalo Wilderness Rocky Mountain Recipe High-Protein Adult Dry Dog Food

Protein Rich Formula
Blue Buffalo Wilderness Rocky Mountain Recipe High-Protein Adult Dry Dog Food
8.7

Blue Buffalo

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This dry dog food features a dense kibble made with real beef, giving it a hearty feel that suits active adult dogs. The recipe is practical for daily feeding routines and is designed for owners who want to avoid common fillers. Its focus on high-protein content makes it a suitable choice for energetic breeds.

What We Like:

  • Real beef as first ingredient
  • High-protein for active dogs
  • No poultry by-product meals
  • No corn, wheat, or soy
  • Antioxidant support included

What Could Be Improved:

  • Not tailored for puppies or seniors
  • May be too rich for sedentary dogs

How to Choose Dog Food for Underweight Dogs

Calorie Density and Nutritional Content

Underweight dogs need more calories without overfeeding volume. Focus on nutrient-rich options that supply energy, protein, and essential nutrients.

Digestibility and Ingredient Quality

Easily digestible foods help your dog absorb more nutrients, which is crucial for weight gain and recovery.

Feeding Method and Palatability

Palatability matters—underweight dogs may have low appetite, so appealing flavors and textures can make a difference.

Suitability for Age and Breed

Choose a formula that matches your dog's life stage and size to ensure safe, effective weight gain.

Practical Use and Routine

Practicality matters for daily feeding. Pick a product that fits your schedule and your dog's preferences.

FAQ For Dog Food For Underweight Dogs

1. What should I look for in dog food for underweight dogs?

Focus on high-calorie, nutrient-dense foods with quality protein and healthy fats. Easily digestible ingredients and added vitamins can also support healthy weight gain.

2. How can I help my underweight dog gain weight safely?

Increase calorie intake gradually, choose foods with extra protein and fat, and feed smaller meals more frequently. Always consult your veterinarian for underlying health issues.

3. Are supplements or toppers helpful for underweight dogs?

Yes, supplements and toppers can add calories and nutrients, especially for picky eaters or dogs with low appetite. Choose options that are easy to mix with regular food.

4. Can any dog food be used for weight gain?

Not all dog foods are suitable—select those specifically designed for higher calorie needs or weight gain, and avoid foods with excessive fillers or low-quality ingredients.

5. Is it safe to switch my dog's food to help with weight gain?

Switch foods gradually over several days to avoid digestive upset, and monitor your dog's response. Consult your vet before making significant dietary changes.
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Peter Armani

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