10 Best Weight Gain For Dogs in 2026

With 29 vitamins and minerals plus omega-3 fish oil as its number one ingredient, this gel provides a dense nutritional profile for dogs and cats. That matters when you’re trying to put weight on a senior dog, a picky eater, or a cat that needs extra calories. The vet-reviewed formula is designed to be safe for pets of all ages, and the appetite-stimulant effect helps even finicky pets eat it. It covers weight gain, appetite stimulation, and daily nutrition in one product.

The trade-off is the gel itself. Unlike the Bully Max soft chews, this is a gel that can be mixed into food or water, and the fish oil content may be noticeable. For a pet that turns up its nose at anything with a strong smell, that could be a problem. But if your dog or cat already tolerates fish-based foods, the added omega-3 benefits for skin, coat, and joints are a plus. For a single product that covers weight gain, appetite stimulation, and daily nutrition, this is a complete option in the guide.

A high-calorie low-volume liquid that packs concentrated energy without taking up stomach space is the core reason this formula works for underweight, active, or recovering dogs. PetAg Dyne delivers dense nutrition in a sweet vanilla flavor that most dogs take to quickly, and you can pour it straight over kibble or offer it on its own. That flexibility makes it a practical choice for picky eaters or dogs who need a calorie boost without interrupting their regular feeding routine.

The liquid format does require shaking before each use, which is a minor extra step compared to a soft chew like Bully Max Weight Gainer. However, it also allows you to adjust the dose more precisely, which can be helpful for dogs with varying calorie needs. For owners who want a straightforward calorie supplement that can be mixed into meals without extra chewing or waiting, this liquid formula fills that gap neatly.

Each bag delivers 1,500 calories and 250 million CFUs of probiotics, which means you get both weight gain support and digestive health in one chew. That combination makes this a smart pick for dogs who need to put on pounds but also struggle with sensitive stomachs or immune support. The bacon flavor and soft texture help even picky eaters take it willingly, and the ingredient list skips sugar, gluten, and artificial additives, so you are not trading nutrition for convenience.

Each soft chew provides only 24 calories, so a dog needing a serious calorie surplus will need several chews per day. That adds up fast compared to a gel like Miracle Vet High-Calorie Weight Gainer that delivers more calories per dose. For owners who want a straightforward treat-style supplement with built-in gut health benefits, this is a practical option. Just plan on feeding multiple chews daily if your dog has a significant weight deficit.

A 30% crude protein and 34% crude fat formula means this powder delivers concentrated calories and protein without switching your dog’s main food. That matters for dogs coming off illness or surgery, or those with a metabolism that burns through meals too fast. The sweet bacon flavor and high fat content work together to nudge picky eaters back to the bowl, making it a practical choice for owners who need reliable daily intake from an underweight dog. It suits any breed or age, with a half-scoop serving for puppies and a full scoop for adults, stretching a single container to about three months of use.

This is a powder, so you have to mix it into wet food or sprinkle it over kibble every meal. It is not as grab-and-go as a gel or chew. Compared to the Bully Max Weight Gainer Soft Chews, which offer pre-portioned convenience, the PET CARE Sciences powder gives you more control over dosage but demands a bit more routine. For owners who don’t mind a few extra seconds at feeding time and want a high-protein, high-fat supplement that pulls double duty as an appetite stimulant, this is a solid fit.

A dog that refuses its regular food can be a real challenge, but this high-calorie nutritional gel offers a simple workaround. The malt flavor is designed to appeal to picky eaters, and the smooth, easily digested texture allows for flexible feeding. You can place a small amount directly on your pet’s nose or paw, or squeeze it straight from the tube. Many owners find their dog will readily lick it off a finger, making mealtime less stressful for both pet and parent. It delivers extra calories along with essential nutrients and vitamins, providing reliable daily nutrition without a fight.

Each tube is 4.25 ounces, so if your dog needs a sustained weight-gain program over weeks, you will be buying replacements more often than you would with a larger bottle like PetAg Dyne High Calorie Liquid Supplement. For owners who just need an easy, low-stress way to boost calories for a finicky dog right now, this gel delivers without the measuring or mixing.

This gel packs extra calories and essential fatty acids into a malt-flavored tube that you can squeeze straight into your pet’s mouth or dab on their nose. The omega-3, 6, and 9 from fish oil support joint, heart, and skin health. That is helpful when you are trying to get a picky eater or a senior dog back to a healthy weight without a fight. It’s a straightforward, low-fuss option for dogs and cats alike, and the easy feeding method means you spend less time wrestling with a syringe or spoon.

The 4.25 oz tube is compact and convenient for travel or small pets, but if you have a larger dog or multiple animals, you’ll be reordering more often than with a bigger bottle like the PetAg Dyne High Calorie Liquid Supplement. That one comes in a 32 oz container, so it lasts longer, but it’s a liquid rather than a gel and has a different flavor profile. For a single cat or small dog who needs a calorie boost without a lot of fuss, this gel is a practical, effective tool.

At just 0.2 pounds, the Under the Weather Ready Cal Gel is a compact, targeted tool for the specific moment your dog won’t eat. The dial-a-dose tube lets you give exactly the right amount of a gel packed with 10 vitamins, 7 minerals, and omega fatty acids. It is formulated to stimulate appetite and boost energy when illness or a medical procedure has your dog turning away from food. It’s made in the USA without artificial flavors or dyes, which is important when you are trying to coax a picky or recovering dog back to the bowl.

The 0.2-pound tube is compact, so it’s best suited for short-term use rather than a long-term weight gain program. If your dog needs sustained calorie loading over weeks, a larger-format product like the All American Canine Weight Gainer Powder (1.5 pounds) might offer more servings per container. But for a dog that needs a quick appetite boost after illness or a procedure, this gel’s dial-a-dose tube and precise dosing make it a practical option.

A 1½ teaspoon per 10 pounds daily dosage means this gel adjusts neatly to a puppy or kitten’s small body weight, so you aren’t guessing how much to give a growing animal. That precision is useful when a young pet is recovering from illness, dealing with low appetite, or just needs a calorie boost without overwhelming its system. The malt flavor helps too, squeezing it directly into the mouth or mixing with food is straightforward, and the Omega 3-6-9 fatty acids plus B-complex vitamins support energy and development during a stage when every nutrient counts.

The 5-ounce tube is a compact size that works well for small pets, but for a larger dog or multiple pets you may need to reorder more often than you would a larger container like the 32-ounce PetAg Dyne High Calorie Liquid Supplement. The gel format is straightforward to squeeze into the mouth or mix with food, though some pets may shake their head during dosing, which can be a bit messy. Still, for someone with a small or young pet who needs targeted calorie support in a palatable form, this gel keeps the dosing simple and the ingredients focused.

Sixty servings of a powder packed with beef broth protein, whey, and liver powder mean this is built for dogs that need serious muscle, not just a calorie bump. The ingredients list includes sweet potato, pumpkin, and blueberry powder, along with probiotics and joint-supporting components as stated on the label. This suits owners who want a targeted muscle-building supplement for an underweight or recovering dog that already eats solid food and needs a calorie-dense boost without fillers.

The main trade-off is that this is a powder, so it takes more effort than a gel you squeeze onto the tongue. Compared to the Miracle Vet gel, which is ready to feed straight from the tube, this requires mixing into meals, a real hurdle if your dog is a picky eater. But the ingredient list includes beef broth protein, whey protein, and ground flaxseed, and the company says it contains no artificial colors or trans fats.

With five targeted amino acids including L-Arginine and L-Glutamine, these chews focus on muscle recovery and lean mass rather than just packing on any weight. That makes them a smarter fit for dogs who need to build strength along with filling out, especially active or recovering dogs. The addition of turmeric, ashwagandha, and Wild Alaskan Salmon oil gives the formula a natural boost that sets it apart from simpler calorie-only supplements. For owners who want to support their dog’s overall vitality while addressing weight gain, this is the most complete amino acid option in the guide.