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10 Best weight gainers for dogs of 2026

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  • Best Choice

    1

    PetAg Dyne High Calorie Liquid Nutritional Supplement for Dogs & Puppies 8 Weeks and Older - 1 Gallon - Supports Performance and Endurance - Sweet Vanilla Flavor
    PetAg
    9.8
    Exceptional

    PetAg Dyne High Calorie Liquid Nutritional Supplement for Dogs & Puppies 8 Weeks and Older - 1 Gallon - Supports Performance and Endurance - Sweet Vanilla Flavor

    20% Off
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  • Value for Money

    2

    Dog Weight Gainer 90 Servings - Weight Gain Supplements for Dogs - Canine and Dog Muscle Builder - Made in The USA
    PET CARE Sciences
    9.7
    Exceptional

    Dog Weight Gainer 90 Servings - Weight Gain Supplements for Dogs - Canine and Dog Muscle Builder - Made in The USA

    • manufacturer recommended age:0 months and up
    • is discontinued by manufacturer:No
    • country of origin:USA
    • package dimensions:10.59 x 6.85 x 3.54 inches 1.75 Pounds
    • asin:B07LFG2BTF

  • 3

    All American Canine Dog Weight Gainer – High Calorie Dog Food Supplement & Protein Powder for Rapid Weight Gain, Mass, and Recovery – Appetite Stimulant – 60 Servings
    All American Canine
    9.6
    Exceptional

    All American Canine Dog Weight Gainer – High Calorie Dog Food Supplement & Protein Powder for Rapid Weight Gain, Mass, and Recovery – Appetite Stimulant – 60 Servings

    • product dimensions:7 x 3.5 x 11 inches 1.57 Pounds
    • country of origin:USA
    • asin:B0CHN7J9RT
    • date first available:September 27, 2023
    • item model number:AAC-WG-60

  • 4

    Miracle Vet High-Calorie Weight Gainer for Dogs & Cats - Multivitamin Nutritional Supplement Gel, Omega Fish Oil, Calcium - Puppy, Senior, Prenatal Cat & Dog Vitamins, Supplements for Weight Gain
    Miracle Vet
    9.3
    Excellent

    Miracle Vet High-Calorie Weight Gainer for Dogs & Cats - Multivitamin Nutritional Supplement Gel, Omega Fish Oil, Calcium - Puppy, Senior, Prenatal Cat & Dog Vitamins, Supplements for Weight Gain

    • manufacturer recommended age:N/A
    • is discontinued by manufacturer:No
    • country of origin:USA
    • package dimensions:N/A
    • asin:B072BKVRPQ

  • 5

    All American Canine Dog Weight Gainer Liquid – High Calorie Dog Food Supplement for Rapid Weight Gain, Mass, and Recovery – Appetite Stimulant – 60 Servings
    All American Canine
    9.2
    Excellent

    All American Canine Dog Weight Gainer Liquid – High Calorie Dog Food Supplement for Rapid Weight Gain, Mass, and Recovery – Appetite Stimulant – 60 Servings

    • package dimensions:7.95 x 2.28 x 2.2 inches; 15.2 ounces
    • asin:B0DX8N5Q8T
    • date first available:June 5, 2025
    • best sellers rank:#4 in Dog Amino Acid Supplements
    • manufacturer:All American Canine
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  • 6

    Bully Max Dog Weight Gainer Soft Chews for Puppies and Adults - High Calorie Dog Food Performance Supplements for Healthy Weight Gain, Immunity & Digestive Health - 75 Chews for All Breeds & Ages
    Bully Max
    8.9
    Very Good

    Bully Max Dog Weight Gainer Soft Chews for Puppies and Adults - High Calorie Dog Food Performance Supplements for Healthy Weight Gain, Immunity & Digestive Health - 75 Chews for All Breeds & Ages

    • manufacturer recommended age:N/A
    • is discontinued by manufacturer:N/A
    • country of origin:USA
    • package dimensions:8.35 x 2.28 x 1.61 inches 11.46 ounces
    • asin:B0CLPGT1QD

  • 7

    Under the Weather Pet | Ready Cal for Dogs 100cc | High Calorie Supplement | Weight Gainer and High Calorie Booster | 10 Vitamins, 7 Minerals & Omega Fatty Acids
    Under the Weather
    8.7
    Very Good

    Under the Weather Pet | Ready Cal for Dogs 100cc | High Calorie Supplement | Weight Gainer and High Calorie Booster | 10 Vitamins, 7 Minerals & Omega Fatty Acids

    • package dimensions:10.47 x 1.73 x 1.5 inches; 3.5 ounces
    • asin:B07MMP6JFT
    • date first available:January 15, 2019
    • item model number:0100023.100
    • best sellers rank:#2 in Cat Multivitamins

  • 8

    All American Canine Dog Weight Gainer + Digestive Aid Formula, Natural Health Supplement Food Topper, Weight Gain Supplements for Dogs, & Dog Muscle Builder - 60 Servings
    All American Canine
    8.5
    Good

    All American Canine Dog Weight Gainer + Digestive Aid Formula, Natural Health Supplement Food Topper, Weight Gain Supplements for Dogs, & Dog Muscle Builder - 60 Servings

  • 9

    Bully Max Liquid Weight Gainer for Dogs – High Calorie Dog Supplement with Omega-3 & Whey Protein – 2-in-1 Multivitamin for Healthy Weight Gain – for Puppies & Adult Dogs – 16 oz
    Bully Max
    8.3
    Good

    Bully Max Liquid Weight Gainer for Dogs – High Calorie Dog Supplement with Omega-3 & Whey Protein – 2-in-1 Multivitamin for Healthy Weight Gain – for Puppies & Adult Dogs – 16 oz

    • manufacturer recommended age:N/A
    • is discontinued by manufacturer:N/A
    • country of origin:USA
    • package dimensions:9.06 x 4.49 x 1.73 inches 1 Pounds
    • asin:B09DRFP6YL

  • 10

    Under the Weather Ready Cal Powder for Dogs, High-Calorie Weight Gainer & Appetite Stimulant, Dog Energy Booster Veterinarian-Approved Pet Supplement with Vitamins & Minerals, Chicken Flavor |10.58 oz
    Under the Weather
    8.2
    Good

    Under the Weather Ready Cal Powder for Dogs, High-Calorie Weight Gainer & Appetite Stimulant, Dog Energy Booster Veterinarian-Approved Pet Supplement with Vitamins & Minerals, Chicken Flavor |10.58 oz

    • manufacturer recommended age:N/A
    • is discontinued by manufacturer:N/A
    • country of origin:USA
    • package dimensions:N/A
    • asin:B0DVV6KZCB

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