How to Fatten up a Cat | Best Cat Food to Gain Weight

Last updated: Sep 19, 2018 @ 10:44 am

Have you ever found a stray that was a little underweight? Maybe your cat became sick and lost several pounds? Whatever your situation, sometimes our feline friends need some extra calories in order to obtain the proper nourishment they need.

Learn how to make your cat gain weight, high-calorie cat food and see our recommendation on the best cat food to gain weight.

In this article:

  • Why Is Your Cat Losing Weight?
  • How to Make Your Cat Gain Weight
  • High-Calorie Cat Food Selection

Why Is Your Cat Losing Weight?

First, before adjusting your cat’s diet or feeding schedule, it’s important to check with the veterinarian to find out why your cat is losing weight.

If your cat at home is losing weight and you don’t know why definitely check with the vet first. Your cat may have an underlying health condition or the food you provide may not be nutritious enough.

Best Cat Food to Gain Weight | Fluffy Kitty

Just as a quick reminder, here are a few reasons as to why your cat may lose weight:

  • Worms/intestinal parasites
  • Food/food allergies
  • Inflammatory bowel disease
  • Anxiety, stress, etc.
  • Gastrointestinal issues
  • Diabetes
  • Cancer/cardiovascular diseases
  • Toothache

How to Make Your Cat Gain Weight

There are several ways you can help your kitty reach a healthy weight. Remember, always consult a vet before making drastic changes to your cat’s diet. Moreover, if you’re ever unsure or have doubts, don’t hesitate to talk to your vet!

1. Select a healthy & nutritious food brand

Choosing a high-quality cat food is the first step. Make sure that the first couple ingredients include real, wholesome meat (protein).

Avoid cat foods high in corn, soy, cereals, additives, meat by-products, etc., as these are difficult to digest and not nutritionally-beneficial for cats (especially over the long-term).

Best cat food to gain weight | Fluffy Kitty

2. Increase food amount + frequency

You can try to add a little weight on your cat by increasing feeding frequency and amounts. Cats would much prefer to eat smaller portions several times a day rather than one large bowl once per day.

It is actually more natural for their digestive systems and will encourage kitty to have an appetite and eat more. Try increasing the amount of food and spreading it out across the day.

So instead of one lump of kibble once a day, split it into 3.

Dry cat food is often higher in calories than wet cat food (because of moisture content, etc). However, if you choose to provide a dry-food diet to your cat, just make sure to provide plenty of fresh, clean water to ensure your cat is getting hydrated properly!

3. Give tasty treats between meals

Another way to fatten up your kitty is to give supplemental tasty treats in between meal times. It’s great for boosting your cat’s calorie intake. Just pay attention not to spoil him/her too often, otherwise, they might lose excitement for their dinner. 😉

Best Cat Food to Gain Weight | Fluffy Kitty

Check Prices Meow

H3 essentials offer a great line of healthy, freeze-dried cat treats that treat kitty to nutritious raw meat. A part of the proceeds helps support the Big Cat Rescue sanctuary in Florida.

Read about Yoda and his awesome treats to help spread the word about the “Little cats helping big cats” campaign.

4. Supplement kibble with “human” food

In addition to a healthy dry and wet food diet, consider adding wholesome cooked ingredients to their meal–such as unseasoned chicken breast or plain rice. Check out our handy article on human foods cats can eat (and foods that should be avoided).

See our updated “Can Cats Eat That??” article on the top FAQ about which popular foods cats can eat.

Best cat food to gain weight | Fluffy Kitty

High-Calorie Cat Food | Our Selection

A high-calorie diet is not recommended for just any cat. As it’s packed with lots of calorie and fat content, it is aimed at cats who need lots of calories and fast. This is typical for cats who have been seriously ill and have lost a lot of weight.

Kitten food offers a well-balanced diet for pregnant cats, and it’s recommended to get special senior cat food for older cats — but in either case, it’s always important to check with your vet first.

Our Recommendation

When looking for reliable cat food brands we recommend the following:


$$$$15 lbsFresh meats, organs, and cartilage in ratios that mirror the natural diet

Rich source of amino acids such as Taurine (essential for his heart)

Source of DHA and EPA (reinforcing your cat’s immune and nervous systems)

$$11 lbsProtein-rich chicken, healthy complex carbohydrates, natural antioxidants

Weight management and lean muscle development

Healthy heart, digestion, immune system

$$12 lbsReal turkey, chicken, whitefish, herring, salmon oil and cranberries

Fish and flax omega blend for healthy skin and coat, Taurine for heart health

Enhanced with nutrients, antioxidants and probiotics

Each of these choices offers wholesome, rich-in-protein, nutritional ingredients.

Note: While these options are great for everyday use to keep your cat healthy and maintain weight, these are not nutritional supplements especially designed for quick weight gain (for injured or ill cats, for example).

Prescription formulas for weak or sick cats should be recommended by a vet, however, many vets and pet owners on the net recommend Hill’s Science Diet.

Check Prices Meow

Before putting your cat on a prescription, calorie-dense formula, contact your vet.

In cases where you have already spoken with a vet and you know your cat’s target weight, the above food brands are a great source of healthy nutrition for cats.

Best cat food to gain weight | Fluffy Kitty

Final Thoughts: How to Fatten up a Cat | Best Cat Food to Gain Weight

Weight loss in cats can become a life-threatening issue. Always take note when your cat is losing weight as this is a sign of a physical, mental, or health problem. Sometimes simply changing their diet serves as a quick fix, however, don’t take any risks.

Weight loss can happen very fast, so it’s important to keep your cat’s health in check. Never hesitate to contact a vet if you have any doubts about your cat’s health.

For more information on cat nutrition, visit our ultimate guide here.


  1. ARose said:

    Thank you for all the info! I have two young cats that are so skinny so I was looking for ways to fatten them up a bit. I think I will switch to one of the recommended foods from the list and get them some treats!!!

    August 12, 2018
    • Hey there! Thanks so much for your sweet comment! We are pawsitive you’ll find food that fits your kitties just right! 🙂 Thank you for your comment and good luck!

      August 13, 2018

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