10 Best Dog Weight Gainers 2026 in the United States

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 11-in-1 Muscle Gain Power Chews are designed for dogs needing extra muscle growth and recovery support. These chews are high in protein and calories, providing 5x more protein and 4x more calories per serving than many competing products. This makes them a potent option for enhancing muscle development in dogs of all breeds and all life stages, including puppies and adult dogs.

The inclusion of BCAAs like L-Leucine, L-Isoleucine, and L-Valine aids in muscle recovery and strength, which is beneficial for active or working dogs. Furthermore, the chews feature advanced antioxidant protection with astaxanthin, which supports overall health and immune function. The advanced time-release technology ensures optimal nutrient absorption throughout the day, enhancing their effectiveness.

These chews are also vet-recommended and safe for pregnant or nursing dogs. On the downside, the high caloric and protein content may not be suitable for dogs with specific dietary restrictions or those prone to obesity. Additionally, while the chews are designed to be tasty, individual dogs’ flavor preferences can vary. Finally, the chews require daily administration, which might be cumbersome for some pet owners. Bully Max chews are a high-quality option for supporting muscle growth and health in dogs, especially those involved in high physical activities.

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.