Thomas Labs Mega Cal High Calorie Liquid Dog & Cat Supplement, 16-oz bottle

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Help your paw-tner gain healthy weight with Mega Cal Dog & Cat Liquid. This supplement is a high-calorie formula that provides your furry friend with essential vitamins, minerals and amino acids. It can be used as nutritional support for pregnant, lactating and recovering animals, as well as provide energy to working and sporting pets. Give your sidekick exactly what she needs with Thomas Labs Mega Cal Dog & Cat Liquid.

Key Benefits
  • Supplement supports healthy weight gain in your furry friend.
  • High-calorie formula that provides essential vitamins, minerals and amino acids.
  • Provides nutritional support for pregnant, lactating and recovering animals.
  • Supplies energy to working and sporting pets.
  • Liquid contains needed calories and essential nutrients for both dogs and cats.

See all items by Thomas Labs

  • Item Number
  • Weight
    1.0 pounds
  • Lifestage
  • Breed Size
    Small Breeds, Medium Breeds, Large Breeds, All Breeds
  • Food Form
  • Product Form
Nutritional Info

Sorbitol, Soybean Oil, Cod Liver Oil, Water, Milk Product (Dextrose, Sodium Bicarbonate, Sodium Chloride, Potassium Chloride, Pregelatinized Starch, Dried Lacobacillus acidophilus Fermentation Product, Dried Enterococcus faecium Fermentation Product, Kaolin, Ascorbic Acid, Niacin Supplement, Choline Chloride, dl-Methionine, Mendadione Dimethylpyrimidinol (Source of Vitamin K), Sodium Selenite, Zinc Proteinate, Dried Whey, Silicon Dioxide, Ferrous Fumarate, Xanthan Gum, Potassium Carbonate, Sodium Benzoate (a preservative), Beef Flavor, Vitamin E Supplement, Niacinamide, Thiamine Hydrochloride, Manganese Sulfate, d-Calcium Pantothenate, Pyridoxine Hydrochloride, Riboflavin, Magnesium Sulfate, Folic Acid, Calcium Gluconate, Vitamin A Acetate, Vitamin D3 Supplement, Vitamin B12 Supplement.

Caloric Content

4650 kcal/kg; 27.9 kcal/tsp

Guaranteed Analysis (per 6g)
Crude Protein0.18% min
Crude Fat38.23% min
Moisture19.96% max
Ash0.19% max
Phosphorous0.0006% min
Potassium0.0027% min
Magnesium0.0067% min
Iron0.53 mg min
Manganese1 mg min
Iodine0.5 mg min
Vitamin A1045 IU min
Vitamin D60 IU min
Vitamin E6 IU min
Thiamine1.8 mg min
Riboflavin0.2 mg min
D-Pantothenic Acid1 mg min
Niacin2 mg min
Pyridoxine0.8 mg min
Folic Acid 0.2 mg min
Vitamin B 2 mcg min
Feeding Instructions

Administer orally or add to food. For dogs and cats, give 1 tablespoon per 10-lb of body weight, daily or as needed. Shake well before each use.

For dogs and cats only. This product is intended for intermittent or supplemental feeding only. To prevent bottle from leaking, twist top into closed position after last pump of each use.


Why should I include vitamins & supplements in my pet’s diet?

Most commercial pet foods include baseline vitamins and nutrients, but some may not have the adequate amount to suit your pet’s exact health needs. Like in humans, vitamins and supplements can help support your pet’s long-term health, regulating everything from digestion to muscle growth. Consult your veterinarian to determine the best vitamins and supplements for your furry friend.

How often should I give this supplement to my pet?

It is recommended to give the suggested dosage based off your pet’s weight. Please refer to the Feeding Instructions tab and consult with your veterinarian for more information.

Is this supplement safe to use with the medication my pet is currently taking?

If your pet has a medical condition and is taking other medication, we recommend consulting with your veterinarian to ensure that this supplement is safe to use.

My pet is allergic to certain ingredients, will this product be safe to use?

For a complete list of ingredients, click on the 'Nutritional Info' tab, next to the 'Description' tab, just under the product photos. If you are unsure about the safety of this product for your pet, we recommend consulting with your veterinarian.

Does this product come in other product forms?

For a complete assortment of products by the manufacturer of this supplement, click on the link next to the item name at the top of the page. You can also find an assortment of supplements across all product forms on our page.

Rating: 3.4 of 5 stars 5 Reviews 5 Reviews 3.4 out of 5 Stars

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80% Recommend

80% of reviewersrecommend this product

Rating: 3.4 of 5 stars 3.4 / 5

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5 Reviews

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  • 5 out of 5 stars

    Perfect for Dog weight gain

    By on

    We have GSP’s and use this for our show dogs who need a little extra weight, also for our hunting dogs to help keep extra weight in the winter. 1 pump per 10lbs - easy dosage, the dogs love it! I have completely quit using all other weight gain brands.

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  • 5 out of 5 stars

    My pet's love it

    By on

    And I forgot to add it to my shipment this morning.. gotta wait until next time , can't afford the shipping cost , to bad they don't have a last minute add on.. this is good to add to pets food or by itself couple my cat's like it. Love you Chewy thank you for being so Pawsome.

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  • 1 out of 5 stars

    My cat does not like this

    By on

    My underweight cat refuses to eat anything this touches.

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  • 1 out of 5 stars

    My Cat would not touch it

    By on

    I tried everything to truck her she would not go near it. It was like a little kid trying to get her to take cough medicine LOL (Waste of money for me sorry to say)

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  • 5 out of 5 stars

    Cat loved it

    By on

    I think it made the cat "want" to eat her food. It's been working great!

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