10 Best Dog Weight Gainers 2026 in the United States

Bully Max 2-in-1 Muscle Builder Power Tabs are chewable tablets designed to support muscle gain and comprehensive health for dogs of all ages and breeds. This product excels in offering a blend of muscle-building and multivitamin benefits, with nine key ingredients to promote muscle growth. Additionally, it includes essential vitamins and minerals for health support, including heart health, joint support, and cognitive function.

The tablets come with a blend of natural ingredients, ensuring a safe and potent formula without harmful additives. They are flavored to be appealing to dogs, making them easy to administer daily, which is a significant advantage for pet owners.

While the product is made in the USA with globally sourced ingredients, some pet owners might prefer locally-sourced ingredients only. These tablets are a good choice for dogs needing support in weight management, muscle development, or overall vitality, and they come highly recommended by veterinarians.

Under the Weather Pet's Ready Cal for Dogs is a gel-based high-calorie supplement designed to support dogs who need help gaining weight or getting proper nutrition. Its gel form makes it easy to administer, and the measured tubing helps ensure accurate dosing. The supplement is rich in calories and includes 10 essential vitamins, 7 minerals, and omega fatty acids, which contribute to health and nourishment.

This mix of nutrients benefits dogs recovering from illness, those with poor appetite, or underweight dogs of all breeds and life stages. The flavor is formulated for dogs, making it generally palatable. The ingredient quality appears solid, and the product is made in the USA, which can be reassuring.

As a gel supplement, it may work best as a temporary booster rather than a complete meal replacement. If your dog struggles with eating solid food or needs a quick calorie boost, this product could be helpful. Those seeking a more balanced macronutrient profile or specific protein levels might consider additional food or supplements.

The All American Canine Dog Weight Gainer is designed to help dogs gain weight quickly and healthily. It comes as a powder supplement, which is convenient to mix with your dog's regular food. One of its strengths is its rich blend of high-quality ingredients like beef broth protein, whey protein, flaxseed, and various powders from liver, sweet potato, and pumpkin. These provide a good balance of protein and fats, essential for building muscle and increasing energy.

It also includes probiotics and vitamins to support digestion, joint health, and overall well-being, which is a thoughtful bonus for dogs recovering or needing extra care. The flavor is duck liver and dressing, which many dogs find appealing, making it easier to encourage picky eaters. Importantly, the formula avoids artificial additives, trans fats, and unsafe substances, focusing on natural, safe components. The product does not specify exact calorie or macronutrient numbers on the label, so estimating precise intake might require some trial and error. Additionally, dogs with specific allergies or sensitivities to items like whey or liver should check with their vet before use.

The size is good for regular dosing with 60 servings per container, which should last well for most dogs. This supplement is well suited for dog owners seeking a natural, nutrient-rich option to help their dogs gain weight, especially when combined with a balanced diet. It may be less suitable if you want very precise nutritional tracking or if your dog has known allergies to the included proteins.