Written by: Lucas James

Best Vitamins for Cats to Gain Weight

Best Of, Cat Health

Last Updated:

Is your cat a little underweight? Looking for vitamins and minerals to help them gain some weight – check these out.

Best Of, Cat Health

Best Vitamins for Cats to Gain Weight

Written by: Lucas James

Last Updated on:

Best Vitamins for Cats to Gain Weight

Are you worried that your cat is underweight?

What are the vitamins for cats to gain weight?

get nutra thrive for cats as a supplement
Cats need vitamins and we have the best options.  Here are my two cats Maya and Louis.

I have two ragdolls, and I have owned a number of different cats.  The cats pictured in the image above for this post both belong to me.  The ragdoll is Maya and the Tabby-looking barn cat it Louis.  There are a number of weight management things that we have gone through from deworming and vitamins to feed types and feeding schedules.

One of the most important things you can do for your cat to gain weight is to deworm it. There is a natural cycle that you should have your cat on to make sure you take care of any worms.

Food Types and Scheduling

What is the best feeding schedule for cats?

The best feeding schedule for a cat is called combination feeding.  This method consists of a free form dry food available for cats throughout the day, and a regular wet food feeding.  The wet food feeding is usually done in the morning or at dinner time or a little at both.  What this does is allows the cats to have a meal that is scheduled and then eat as they want throughout the day.

This is also the best idea for a cat that is trying to gain weight.  You want them to have as much access to food as possible.

What is the best food for cats?

The best kind of food for a cat is certainly up for debate, especially in terms of brand and type.  Scientifically cats are strict carnivores.   

Whereas dogs are considered closer to omnivores, cats need meat, and they are designed to withdraw their nutrients from a proper diet.   

Deficiencies of certain vitamins and minerals will result in loss of appetite, variable feed intake, diarrhea, weight loss, rough or coarse hair and skin and lethargic behaviour.

Dry food is good for their teeth and to get certain nutrients from the food itself.  It’s also easiest to leave out during the day and not worry about food going bad.

Wet food is closer to the type of food that a cat would eat in the wild and therefore best suited for the cat’s digestive system.  This is also key due to the biology of the cat and how it absorbs vitamins and minerals from its food.

Make sure there is sufficient dietary protein

The most important thing is that cats are designed to get most of their dietary needs from protein.  You need to make sure that their food has protein in it, both wet and dry food.


My ragdolls love cheese.  In fact, it really shows Mayas intelligence because every time I get the cheese out she comes running.  Treats are also a great way to help your cats take medicine and vitamins if you are having a hard time getting them to take them. 

These freeze-dried nutri bites are good, and we feed these at home to our cat and our dog. This is the one-bag listing but they also have two-bag listings which make each bag a little cheaper. check them out.

Nutri Bites Liver Treats for Dogs & Cats, High-Protein Freeze Dried Beef Liver Snacks, Single Ingredient, No Additives, Perfect for Training, Sensitive Diets, Value Bulk Pack 17.6 oz
  • 100% NATURAL – Our freeze-dried dog and cat treats are all-natural and made with only 1 single ingredient, real beef liver. We provide a healthy treat you and your furry friend can trust that is grain free with no additives, preservatives, or fillers.
  • DELICIOUS TASTE FOR TRAINING OR MEAL TOPPING – Elevate your pet’s training sessions or meals with our irresistible Freeze-Dried Treats. Bursting with delicious flavor, these treats, made from premium beef liver, are a perfect topping to enhance any meal. Their savory taste ensures your puppy or cat will be motivated and eager to learn with every rewarding bite.
  • SUPPORT FOR YOUR PET’S HEALTH – Our high-protein, freeze-dried beef liver snacks are not just tasty – they’re also packed with vital benefits. Nutri Bites are packed with essential vitamins and minerals to support your pet’s digestion, immune system, bone and joint health, and reproductive organs!
  • LESS DUST & CRUMBS – Our premium standard freeze-drying process ensures more meat and less unnecessary dust and crumbs. Give your pet the pure joy of wholesome, meat-packed goodness with every treat.
  • 17.6 OZ BULK VALUE POUCH – Offering the best bulk value, each large resealable pouch is packed with 500 grams of premium treats that ensure your furry friend stays happy and healthy without breaking the bank. Treat your pet to quality nutrition at an affordable price with every pouch. Try all pet treats including; freeze-dried beef liver, salmon, and chicken!

Vitamins for Weight Gain in Cats

Vitamins involved in weight

  • Vitamin B6
    • Flesh eaters like cats get most of their energy from dietary protein.  Their B6 requirement is 60% more than that of dogs (1).  So it is important to make sure that your cat’s diet is high in protein which is where they will get a lot of their B6 from.  In general, muscle, liver, vegetables, whole-grain cereals and their by-products, and nuts are among the best sources.
  • Vitamin B12
    • B12 is an essential vitamin for cats.  Typical commercially prepared dog and cat food diets that contain, meat, milk, fish or other animal products should contain ample quantities of vitamin B12.  Cats should receive ample vitamin B12 through fish products, which are rich in the vitamin.
  •  Folic Acid
    • Studies (2) have shown that cats deficient in folic acid will suffer weight loss.  Typical commercial cat foods will have an adequate supply of Folic Acid.
  • Vitamin E
    • Because of the nature of feline diets, Cats are more susceptible than dogs to a deficiency of vitamin E.  Cats that primarily get fish-based canned foods will be most at risk.

Best Multivitamins for Cats

A great diet and a great multivitamin should be all that you need to keep your cat on track.  I want to take a quick moment here however just to remind you that there may be other reasons that your cat is losing weight. 

One of the most likely is worms

Cats get them all the time. 

My Louis cat (pictured in the image) was losing weight and we wormed him.  Within a few days he was maintaining weight and within a few weeks was actually getting a little belly and we had to manage that.

How to Tell if your Cat is Underweight

Obviously, as a pet owner, you will know best about your pet because you see them on a regular basis.  However, it is also good to know what the standard range is for a cat so you know if you need to add or reduce weight.  Ragdoll cats are generally a larger breed and as such will weigh in a little more than others. 

8-15 pounds is a normal range for most domestic cats.  You will need to be aware of your cats bone structure and determine if it’s weight is ok.

If you can see ribs and the backbone you should definitely try to add some weight to your cat.  As importantly behaviour is really important.  If you can is suddenly not eating or really lethargic or some other kind of issue it is important to monitor that and potentially see the vet.

My Grandma Cat is definitely a little better now than when she was moved.  After moving she lost a little weight and was also shaved due to mats from the previous owner.  Her hair now is really growing in nicely and she has put on some weight. 

It just meant normal routine and free access to feed (and treats…ha).  We also gave her some vitamins to help her along the way. 

The most important thing is that the food has the proper vitamins in it because that’s where it needs to be.

Further reading – Ragdoll Cat Pricing information

Sometimes people wonder about the price of ragdoll cats.  If you are interested check this out to see all about it.