10 Best Dog Weight Gainers 2025 in the United States

The Bully Max Pro 2X High Calorie & High Protein Dry Dog Food is a solid option for dog owners seeking to boost their pet's weight and muscle mass. With 600 calories per cup, it is exceptionally calorie-dense, making it suitable for dogs needing to gain weight. The high protein (31%) and fat (25%) contents support muscle building and overall health. This product also includes heart-healthy flaxseed and 19 essential vitamins and minerals, providing a nutritious diet for dogs of all sizes and breeds. It's especially beneficial for performance dogs and those needing to bulk up.

The food is designed for easy digestion and optimal nutrient absorption, which helps in maintaining the dog's energy and well-being without causing digestive discomfort. Additionally, it is free from cheap fillers, soy, corn, and artificial flavors, indicating a focus on ingredient quality. However, potential buyers should be aware that the high-calorie content means portion sizes need to be carefully managed to avoid overfeeding. The flavor is chicken, which generally appeals to most dogs, and the product has received positive reviews for its palatability.

This dog food is made in the USA and adheres to high-quality standards, with a commitment to zero recalls, adding an extra level of assurance. While this product is premium-priced, its high caloric density means it lasts longer than many competitors, providing good value for money. Users should ensure a gradual transition to this food to prevent digestive upset and should follow feeding guidelines closely.

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.

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.