Feb 11, 2022

Just like humans, cats and kittens often need an extra boost to their health with supplements to give them the nutrition they need to overcome colds and help their bodies function properly. Before giving your furry pet any supplements, be sure to consult your local veterinarian to identify what kind of nutrition your kitten is lacking and what you should be looking for in kitten vitamins and supplements. 

Although there are many options to choose from (and deciding what vitamins do kittens need can get overwhelming), these are some of the best in the market that customers are raving about. To make your search as easy as possible, here are:

The Top 10 Best Kitten Supplements Of 2022

Best Overall
Our Score 9.6 Out of 10
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Best Mid Range
Our Score 9.3 Out of 10
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Cheaper Choice
Our Score 9.0 Out of 10
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Our Score 9.0 Out of 10
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Our Score 8.9 Out of 10
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Our Score 8.8 Out of 10
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Our Score 8.7 Out of 10
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Our Score 8.6 Out of 10
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Our Score 8.4 Out of 10
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Our Score 8.2 Out of 10
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Imuquin Immune Health for Kittens (Best Overall)

Our Score 9.6 out of 10
Immune Health for Cats/Kittens 30ct
Immune Health for Cats/Kittens 30ct amazon.com Check price

PROVIDES IMMUNE SYSTEM SUPPORT: Imuquin has a unique blend of ingredients that help support a healthy immune system during times of stress.
VETERINARIAN FORMULATED MIXTURE OF VITAMINS AND MINERALS:...

Full of a good balance of nutrients that cats need to build their immune system and stay healthy

Imuquin Immune Health for Kittens is a powder supplement for kittens over six weeks old and is popular for immune health support. All you have to do is sprinkle the powder on top of your kitten's food once a day or as directed by your vet. According to one verified buyer with a "chronically sick 10-month-old kitten," this product was the only one to work for their "runny eyes and sneezing." They also said it worked in two days!

Pros
  • Fast-acting
  • Has a great mix of kitten vitamins and minerals
  • Easy to administer
Cons
  • A little on the pricier side
  • Only a month's supply, so it may require monthly purchases
  • Some reviews mentioned kittens not liking the flavor

StrellaLab Probiotics For Cats (Best Mid-Range)

Our Score 9.3 out of 10
Probiotics Powder for Cats and Dogs - All Natural Supplement - Digestive Enzymes + Prebiotics - Relieves Diarrhea, Upset Stomach, Gas, Constipation, Litter Box Smell, Skin Allergy -Made in USA- 4oz
Probiotics Powder for Cats and Dogs - All Natural Supplement - Digestive Enzymes + Prebiotics - Relieves Diarrhea, Upset Stomach, Gas, Constipation, Litter Box Smell, Skin Allergy -Made in USA- 4oz amazon.com Check price

Support Healthy Tummy - packed with all essential probiotic and prebiotic, fiber and enzymes, these daily probiotics for cats will help easy various stomach issues like gas, diarrhea treatment, sen...

For kitten owners who want to boost digestion and immunity and reduce smelly gas

StrellaLab Probiotics for Cats is an excellent supplement for kittens that need a boost in probiotics, prebiotics, enzymes, and fiber. It can reduce diarrhea and vomiting in kittens with bad digestion, remedy gas and the foul odors that go with it, and boost their immune system in the process.

According to a verified buyer with three cats (one with stinky poop and two without), They saw a noticeable improvement in just a couple of days. While they said kitty still had some smelly gas and stool, it improved over a couple of weeks with dramatic smell reduction (and some poops not smelling at all).

Pros
  • Eases several digestive problems and improves appetite
  • Doesn't contain preservatives, sugar, or artificial flavoring
  • Safe for kittens of all ages (consult your vet for dosage)
Cons
  • Some reviews mention a dislike for the flavor
  • Takes a few weeks to work

VetriScience Laboratories-NuCat, Multivitamin (Best Value)

Our Score 9.0 out of 10
VetriScience Laboratories-NuCat, Multivitamin formula for Cats, 30 Bite-Sized Chews
VetriScience Laboratories-NuCat, Multivitamin formula for Cats, 30 Bite-Sized Chews amazon.com Check price

Nu Cat is formulated with a balance of amino acids, fish oil omegas and Selenium for added immune system support, these tablets help maintain the overall health of cats, no matter size, age or bree...

Some of the most affordable multivitamins, provided in soft chews that are flavored with fish (your cat's favorite!)

VetriScience Laboratories-NuCat, Multivitamin is a fish-flavored chewable vitamin given to kittens once a day to help build their health and provide them with the key minerals they need to fully function. There is no age requirement for kittens, so it is advised that you discuss safety and dosage with your vet before use. 

According to one verified buyer, the chewable were their favorite product because their kitten's "fur has gotten so much shinier and thicker over the past month of taking these vitamins." Another reviewer mentioned that they are "super moist," and their cat has been much more energetic and happy since taking them.

Pros
  • Great price
  • Chewable (picky cats often prefer chews to powder)
  • Approved by a veterinary review board
Cons
  • Requires monthly purchases
  • Strong flavor sticks to human fingers
  • Some cats refuse to eat

PetAg KMR Kitten Milk Replacer Powder

PetAg KMR Kitten Milk Replacer Powder - Prebiotics and Probiotics - Newborn to Six Weeks - Kitten Formula - 6 oz
PetAg KMR Kitten Milk Replacer Powder - Prebiotics and Probiotics - Newborn to Six Weeks - Kitten Formula - 6 oz amazon.com Check price

Provides: Vitamins, minerals, and trace nutrients for kittens that have been orphaned or rejected
Milk Powder: Easy to mix, highly palatable, and easy for kittens to digest
Kitten Milk Replacer: Id...

For newborn to six-week-old kittens that need probiotics and probiotics

PetAg KMR Kitten Milk Replacer Powder is a great supplement for kittens that are newborn to six weeks who need replacement milk to support those first few weeks that are vital for health and growth. It is full of the milk proteins and taurine kittens at this age rely on from mom cats, making it a great alternative for those who do not have a mom cat nearby.

One verified buyer raved that they used this product for an abandoned kitty they saved, and it "took to this KMR without any trouble at all. We took him to a vet for a check-up and to make sure we were doing things right. He weighed 4.3 oz at a few days old." Another buyer added that it could also be one of the best supplements for getting a kitten to gain weight while sick. 

Pros
  • Easy to mix
  • Easy for kittens to digest at a young age
  • The bigger the pack you buy, the better the value
Cons
  • Some kittens won't drink it
  • Complaints of not dissolving fully
  • Product packages can be deceiving (powder is only full to half the can size)
  • Caused diarrhea for some

Breeder's Edge Kitten Lyte- Feline Electrolyte Supplement

Breeder's Edge Kitten Lyte- Feline Electrolyte Supplement for Cats and Kittens- 300 gm
Breeder's Edge Kitten Lyte- Feline Electrolyte Supplement for Cats and Kittens- 300 gm amazon.com Check price

Helps maintain hydration and replenish electrolytes
Helps maintain hydration and replenish electrolytes
Supports energy production
Provides amino acids and minerals including sodium chloride, tauri...

For kittens that need a boost in electrolytes

Breeder's Edge Kitten Lyte- Feline Electrolyte Supplement is a preferred supplement for kittens that aren't getting enough water to stay hydrated. It boosts electrolytes (which also supports energy and fluid balance in blood and tissue) and also has important amino acids and minerals. According to several verified buyers, the flavor is well liked by many kittens, encouraging them to drink more. 

Pros
  • Gets your kitten hydrated
  • Can buy in smaller quantities if you only need it temporarily
  • Tastes like chicken
Cons
  • Powder form
  • Isn't for immune support or overall health, only hydration, so you may need another supplement for nutritional boosts (consult your vet)

Hartz Powdered Kitten Milk Replacer Formula

Our Score 8.8 out of 10
Hartz Powdered Kitten Milk Replacer Formula - 11Oz
Hartz Powdered Kitten Milk Replacer Formula - 11Oz amazon.com Check price

Precisely Formulated To Match A Mother Cat’S Milk
Quick-Mix Powder Blends Easily With Room Temperature Water For On-Demand Feeding; Use With The Hartz Nursing Bottle (Sold Separately)
Features Calc...

Milk replacement for newborn kittens or added nutrition for pregnant/nursing mothers

Hartz Powdered Kitten Milk Replacer Formula is more often used for the first six weeks of a kitten's life to fill them with all the nutrition they need to grow happy and healthy: calcium, taurine, lysine, linoleic, and more. However, it can be beneficial for nursing moms who need a boost in nutrition to make sure their kittens are getting everything they need while keeping mom cats healthy as well.

According to many verified buyers, the flavor seems favorable to kittens of all ages. It has helped some people with everything from new kittens without a mother to older kittens who wouldn't eat. 

Pros
  • Made with real milk protein
  • Affordable
  • Quick and easy to mix
Cons
  • There have been reports of bugs in the can (contact manufacturer if this happens)
  • Has caused some kittens to throw up

Under the Weather Pets | Ready Cal Kitten

Our Score 8.7 out of 10
Under the Weather Pet | Ready Cal for Kitten| High Calorie Pet Nutritional Supplement for Weight Gain & Healthy Weight Maintenance | 10 Vitamins, 7 Minerals, Omega Fatty Acids & Carbohydrates | 80cc
Under the Weather Pet | Ready Cal for Kitten| High Calorie Pet Nutritional Supplement for Weight Gain & Healthy Weight Maintenance | 10 Vitamins, 7 Minerals, Omega Fatty Acids & Carbohydrates | 80cc amazon.com Check price

MEASURED TUBING - This gel supplement for your kitten comes in a convenient dial-a-dose tube to ensure that you’re able to give your kitty the proper dosage it requires.
HELPS WITH WEIGHT GAIN & MA...

For kittens who aren't eating because they're feeling under the weather and need a supplement to gain weight

Under the Weather Pets | Ready Cal Kitten is for kittens who stop eating, often because they are too sick to have an appetite. Since supplements can be challenging to trick kittens into taking, it is helpful that this one is already prepared in a syringe (although there have been complaints of leaking). According to many verified buyers, this product has been great for keeping kittens healthy while sick. Some even raved that it was good for their picky eaters as well. 

Pros
  • Measured tubing for easier use
  • Improves appetite when kittens are sick
  • No corn, dyes, or artificial flavors
  • Full instructions on the label
Cons
  • Expensive for one-time use
  • Can be too thick for some kittens
  • The syringe is considerably big

Omega 3 Fish Oil for Cats and Kittens

Our Score 8.6 out of 10
Omega 3 Fish Oil for Cats - Better Than Salmon Oil for Cats - Kitten + Cat Vitamins and Supplements - Cat Health Supplies - Cat Dandruff Treatment - Liquid Fish Oil for Pets - Cat Shedding Products
Omega 3 Fish Oil for Cats - Better Than Salmon Oil for Cats - Kitten + Cat Vitamins and Supplements - Cat Health Supplies - Cat Dandruff Treatment - Liquid Fish Oil for Pets - Cat Shedding Products amazon.com Check price

Reduce Shedding + Improve Skin and Coat - Plano Paws Wild Caught Omega 3 for Cats is made with pure Anchovies, Herring, Mackerel, and Sardines from the clear ocean waters off the coast of Iceland.
...

Liquid fish oil for reduced shedding and improved skin and coat 

Omega 3 Fish Oil for Cats and Kittens is a great go-to supplement for kittens that shed too much. It not only adds a boost to their skin and coat health but also reduces the amount of cat hair that gets all over the house. Meanwhile, fish oil is also beneficial for joint health and heart health! Verified buyers saw quick results (some even claimed immediate results) in their kitten's fur after giving them this fish oil.

Pros
  • Reduces cat hair shedding
  • Easy application
  • For all ages
Cons
  • Some cats don't like the flavor
  • Can be pricey

L-lysine Immune Support for Kittens

Our Score 8.4 out of 10
Lysine for Cats - L Lysine Powder Cat Supplements - 900mg, 200 Scoops - Llysine Kitten, Cat Immune System Support Supplement for Cold, Sneezing, Eye Health, Upper Respiratory Infection Treatment, USA
Lysine for Cats - L Lysine Powder Cat Supplements - 900mg, 200 Scoops - Llysine Kitten, Cat Immune System Support Supplement for Cold, Sneezing, Eye Health, Upper Respiratory Infection Treatment, USA amazon.com Check price

L-LYSINE FOR CATS SUPPLEMENT POWDER - 900 Mg of Llysine Hydrochloride per scoop, natural Chicken Liver Flavor for picky eaters. Safe for kittens, adults & senior cats of all breeds. Sprinkle Lysine...

Chicken liver flavored supplement to help boost kitten immune systems (helps with colds, eye health, and most importantly — upper respiratory treatment) 

Does your kitten keep sneezing or have breathing problems? L-lysine Immune Support for Kittens can be a great treatment for cold symptoms and respiratory infections. The chicken liver flavored powder also boosts immune support without added medications and antibiotics. According to one verified buyer who has a kitten that suffered respiratory infections for more than two years, "My cat was failing, and this stuff has literally brought him back.” The reviewer added that everyday kitty seemed to improve more and more.

Pros
  • Great value (200 scoops per can)
  • Offers a variety of vitamins and minerals for immune support in addition to respiratory support and eye health
Cons
  • Powder formats can sometimes be harder to get kittens to eat
  • Can be too coarse for some cats

Kin+kind Organic Fiber for Cats

Our Score 8.2 out of 10
kin+kind Organic Fiber for Dogs & Cats - Pumpkin Boost for Healthy Poops - Stomach and Bowel Support - Safe, Natural Formula with Flax Seed, Ginger, Turmeric and Coconut - Made in USA
kin+kind Organic Fiber for Dogs & Cats - Pumpkin Boost for Healthy Poops - Stomach and Bowel Support - Safe, Natural Formula with Flax Seed, Ginger, Turmeric and Coconut - Made in USA amazon.com Check price

DIGESTIVE SUPPORT: A balanced source of soluble and prebiotic fiber, protease, and digestive enzymes support bowel regularity, a strong gut, and healthy digestion. Featuring a blend of organic Ging...

For kittens struggling with their digestion and needing a boost in healthy bowel movements

Kin+kind Organic Fiber for Cats can be a great solution for kittens who have a hard time pooping or are having terribly bad smelling poops. It uses organic ingredients to get things moving for your furry pets: pumpkin, flaxseeds, coconut, ginger, and more. According to several verified buyers, this product is great for stopping diarrhea and normalizing stools, so kittens get back to eating regularly.

Pros
  • An organic pumpkin supplement
  • Certified by USDA as organic
  • Easy application
Cons
  • Complaints that it smells like chemicals
  • Some kittens/cats refuse to eat

The Takeaway

Overall, any one or more of these best kitten supplements can be great for your feline’s health, depending on the issues you're observing and the solutions recommended by your veterinarian. It can be overwhelming and stressful to search for the right supplements that both work and appeal to your picky-eater. While it may take some creativity figuring out how to give vitamins to kittens, hopefully these highly-reviewed and recommended products will get your kitty back to normal and ready to play again! 

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