Get

In Your Inbox

Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

6 Best Kitten Milk Replacers in 2026 – Reviews & Top Picks

Share

bottle feeding a tabby kitten

bottle feeding a tabby kitten Due to unforeseen circumstances, some people must take in newborn kittens that need to be cared for around the clock. There are many reasons that this can happen, but the important thing here is that the kittens need to be looked after and bottle-fed. This is why finding the best kitten milk replacer is essential!

If you’re new to fostering or your current charges don’t seem to like the kitten milk replacer (also called KMR) that you’ve been using, you need to find something fast. But when you’re looking after one or more kittens, your schedule is incredibly tight. So, here are reviews of six of the best kitten meal replacers. You’ll be feeding those hungry kittens in no time!

divider cat faces oct 2024

A Quick Comparison of Our Favorites

Image Product Details
Best Overall
Winner
PetAg KMR Powder Milk Supplement for Kittens PetAg KMR Powder Milk Supplement for Kittens
  • Comes in liquid and powder forms in different sizes
  • For orphaned kittens and stressed or senior cats
  • All-natural and highly digestible
  • Best Value
    Second place
    Hartz Powdered Milk Replacer Formula for Kittens Hartz Powdered Milk Replacer Formula for Kittens
  • Affordable
  • Includes real milk, taurine, antioxidants, and omegas
  • Easily digested and good for sensitive tummies
  • Premium Choice
    Third place
    Nutri-Vet Powder Milk Supplement for Kittens Nutri-Vet Powder Milk Supplement for Kittens
  • Made with whey protein for essential amino acids
  • Opti-Gut has probiotics for healthy digestion
  • Made in the U.S.A.
  • Whiskas Catmilk Whiskas Catmilk
  • 98% lactose reduced for easier digestion
  • Easy to digest
  • Appeals to picky eaters and kittens transitioning to solids
  • PetAg PetLac Kitten Milk Replacement PetAg PetLac Kitten Milk Replacement
  • Contains FOS and live probiotics for healthy digestion
  • Has taurine and milk proteins
  • Suitable for nursing and post-weaned kittens
  • The 6 Best Kitten Milk Replacers

    1. PetAg KMR Powder Milk Supplement for Kittens — Best Overall

    Pet-Ag KMR Kitten Milk Replacer Powder

    Sizes: 6 oz., 11 oz., 12 oz., 28 oz., or 5 lbs.
    Product form: Liquid or powder
    Protein: 42%
    Fat: 25%

    The best overall kitten milk replacer is PetAg’s KMR Powder Milk Supplement for Kittens. There are many options: It comes in liquid form in one size (11 ounces) and powder form in five sizes (6, 11, 12, and 28 ounces and a 5-pound bag). It provides a completely nutritionally balanced meal for kittens lacking their mother’s milk, but it can also be given to seniors and stressed cats. It’s all-natural and highly digestible, provides necessary minerals and vitamins like taurine and amino acids, and is high in protein.

    The main flaw with this kitten meal replacer is if you opt for the powder form, it sometimes doesn’t incorporate and dissolve well into the water.

    Pros
    • Comes in liquid and powder forms in different sizes
    • For orphaned kittens and stressed or senior cats
    • All-natural and highly digestible
    • Contains necessary nutrients for growing kittens
    Cons
    • Powder doesn’t always consistently incorporate into the water

     


    2. Hartz Powdered Milk Replacer Formula for Kittens — Best Value

    Hartz Powdered Milk Replacer Formula for Kittens

    Size: 11 oz.
    Product form: Powder
    Protein: 30%
    Fat: 40%

    The best kitten milk replacer for the money is Hartz’s Powdered Milk Replacer Formula for Kittens. It contains real milk in addition to necessary minerals and vitamins that include taurine, omegas, and antioxidants for overall health and muscle growth. It closely resembles a mother cat’s milk, so it is gentle on tummies and easily digested. It can be given to senior cats and nursing mothers too.

    However, it doesn’t come with a scoop, and the container is fairly narrow, so it can be challenging to get out. Also, some kittens might get stomach upset with this product.

    Pros
    • Affordable
    • Includes real milk, taurine, antioxidants, and omegas
    • Easily digested and good for sensitive tummies
    • Suitable for senior cats and nursing mothers
    Cons
    • Scoop is not included
    • Might cause stomach upset

    3. Nutri-Vet Powder Milk Supplement for Kittens — Premium Choice

    Nutri-Vet Milk Replacement For Kittens

    Size: 12 oz.
    Product form: Powder
    Protein: 30%
    Fat: 40%

    Nutri-Vet’s Powder Milk Supplement for Kittens is our premium choice pick. It’s made with whey protein, which includes essential amino acids for overall health and growth. Nutri-Vet also offers a custom blend named Opti-Gut, which has probiotics for healthy digestion. It’s full of the right balance of fat, protein, and carbs in addition to vitamins, minerals, and amino acids.

    One of the problems with this product is it is more expensive than some of the others. Also, pickier kittens don’t seem to like it.

    Pros
    • Made with whey protein for essential amino acids
    • Opti-Gut has probiotics for healthy digestion
    • Made in the U.S.A.
    • Right balance of nutrients, vitamins, and minerals
    Cons
    • Expensive
    • Some kittens don’t like it

    4. Whiskas Catmilk

    Whiskas Catmilk 

    Size:  6.75-fl oz cartons (available in 3-packs and larger multipacks)
    Product form: Liquid milk supplement
    Protein: 3.4% minimum
    Fat:  2.2% minimum

    WHISKAS Catmilk is a lactose-reduced milk supplement designed for weaned kittens and adult cats that enjoy the taste of milk but struggle to digest regular dairy products. This product works more as a supplemental treat or nutritional topper that can be served on its own or mixed with food. Because it is 98% lactose reduced, it is gentler on sensitive stomachs while still delivering the creamy taste many cats enjoy.

    The formula is enriched with calcium and protein to support healthy growth and development, and the shelf-stable cartons make storage easy before opening. 

    It is important to note that this is not a complete milk replacer for neonatal kittens and should not replace balanced kitten food.

    Pros
    • 98% lactose reduced for easier digestion
    • Ready-to-serve liquid formula
    • Appeals to picky eaters and kittens transitioning to solids
    • Contains added calcium and nutrients
    • Convenient shelf-stable cartons
    Cons
    • Not a complete milk replacer for newborn kittens
    • Intended as a treat or supplement, not a full meal replacement

    5. PetAg PetLac Kitten Milk Replacement

    PetAg PetLac Kitten Milk Replacement

    Size: 10.5 oz.
    Product form: Powder
    Protein: 33%
    Fat: 18%

    PetAg’s PetLac Kitten Milk Replacement will benefit newborn kittens unable to nurse from their mothers. It’s highly digestible, contains FOS and live probiotics to aid healthy digestion, and has taurine and milk proteins essential for growing kittens. It’s also effective for nursing and for post-weaned kittens.

    However, it can be difficult to mix for some cat owners, and the texture can be grainy. Additionally, it has been known to cause upset stomachs in some kittens.

    Pros
    • Contains FOS and live probiotics for healthy digestion
    • Has taurine and milk proteins
    • Suitable for nursing and post-weaned kittens
    Cons
    • Doesn’t always mix well
    • Texture can be grainy
    • Might cause stomach upset

    6. Fox Valley Day-One Kitten Formula

    Fox Valley Day One Kitten Formula

    Size: 1lb, 3.5lb, 8lb
    Product form: Powder
    Protein: 40%
    Fat: 25%

    The Fox Valley Day-One Kitten Formula is another great pick. It’s made exclusively from human-grade ingredients and fortified with zinc and biotin to support your kitten’s nails and coat. The formula is also calcium/phosphorus balanced for strong teeth and bones, and contains extra taurine, which supports cardiovascular and central nervous system health.

    This formula is recommended for growing kittens, pregnant and lactating mothers, show cats, and even older cats in need of a nutritious boost! Most users report that their cats love this formula, although a couple have said that it can be difficult to mix, and one reported that it caused constipation.

    Pros
    • Human-grade ingredients
    • Easy-to-digest
    • High-protein
    • Fortified with zinc, biotin, and taurine
    Cons
    • Could be difficult to mix
    • May cause constipation

    7. Revival Animal Health Breeder’s Edge Foster Care Kitten Milk Replacer

    Breeder's Edge Foster Care Feline

    Size: 12 oz. & 4.5 lbs.
    Product form: Powder
    Protein: 32%
    Fat: 44%

    Revival Animal Health’s Breeder’s Edge Foster Care Kitten Milk Replacer is formulated to help kittens in their first 35 days of life. It promotes a healthy gastrointestinal tract, which means it’s less likely to cause diarrhea. It contains balanced vitamins, minerals, and nutrients for boosting the immune system and helps condition the skin and coat.

    But it tends to cause poop issues: Some kittens might get diarrhea and others might get constipated. The other problems are more about the seller than the product. For one thing, some cat owners receive a product with a broken seal, and others seem to receive the puppy instead of the kitten formula. If this does happen, do not give the puppy formula to your kitten. They will get an upset stomach. Stock and availability may also be limited.

    Pros
    • Formulated for the first 35 days of a kitten’s life
    • Promotes a healthy GI tract
    • Boosts the immune system
    • Conditions the skin and coat
    Cons
    • Might cause poop issues
    • Product might arrive unsealed
    • Might receive the puppy formula instead

    divider 2 cats

     

    Buyer’s Guide: How to Choose the Best Kitten Milk Replacer

    Before you purchase your chosen milk replacer, let’s go over a few points that can help you make the best decision for your kitten.

    Liquid vs. Powdered

    Liquid formula is one of the easiest to work with because you don’t have to mix or measure the right amount of water, but it does need refrigerating once opened. The liquid has a shorter shelf-life and is more expensive than the powder when you consider how much powder versus liquid is in the packaging.

    You can get far more powdered formula than liquid for the same price, so it’s less expensive and has a longer shelf life. But you do need to mix it, and many powdered formulas don’t always mix well. Whether you choose liquid or powder, though, it will need to be warmed up before feeding your kitten.

    Bottles

    You’ll need kitten bottles and a few different types of nipples for your kitten, in addition to syringes. Your best bet is to go with a variety pack, as kittens can be rather particular about the nipple that they drink from. Some variety packs will include brushes, which will make cleaning the bottles much easier.

    feeding kitten
    Image By: Adina Voicu, Pixabay

    What You Should Look For in a Kitten Milk Replacer

    Considering that kitten meal replacers are designed to replace a mother cat’s milk, there are ingredients and nutrients that you should look for:

    Protein and fat:
    To support their growing body, a kitten needs a formula high in protein and fat. It’s designed to closely resemble the fat and protein found in a mother cat’s milk.
    Vitamins and minerals:
    Kitten milk replacers should contain vitamins and minerals that support a growing kitten. Vitamins like E, B12, D, and A are vital, as is added calcium for growing bones.
    Probiotics and prebiotics:
    Probiotics and prebiotics, including FOS, are crucial for building good bacteria in the gut and contributing to a strong digestive system.
    Amino acids:
    These should include essential taurine, which aids development, vision, and digestion health.

    Reach out to a veterinarian for advice or confirmation that you plan to use an appropriate milk replacer, as correct nutrition at this age is essential.

    Mixing

    Whether you purchase liquid or powder formula, once it’s been opened, you’ll need to store it in the refrigerator. It should be used before the expiration date. While mixing, it should smell a bit sweet, so if it smells “off” to you, such as sharp or bitter smelling, it is likely spoiled and shouldn’t be used.

    Once mixed, place the bottle in warm water to warm it up (or use a bottle warmer if you have one), and apply some of the formula on the inside of your wrist to test the temperature. It should feel comfortable and just warm, never hot.

    While many kittens grow out of the essential supplies you buy for them when they are young, finding a product that can last them a lifetime is like hitting the cat jackpot - which is why we love the Hepper NomNom Cat Bowl so much. Its unique cat-inspired design offers dual, stainless steel bowls that are wide and shallow, crucial for neck support when kittens are little and benefits mature cats by offering whisker relief. If you want to learn more about what other advantages the NomNom will provide for your growing kitten, click here.

    Hepper NomNom - Spill Proof Elevated Cat Bowl
    • NO MESS - The 360° tray on this cat food and water bowl set has a raised design to catch and...
    • WHISKER FRIENDLY - Shallow and wide metal containers with flat bottoms ensure your kitty can enjoy...
    • CHEW-SAFE MATERIALS - Kittens and cats love chewing on silicone and soft rubber - but it's a choking...

    At Catster, we’ve admired Hepper for many years and decided to take a controlling ownership interest so that we could benefit from the outstanding designs of this cool cat company!

    How We Selected Our List of Kitten Milk Replacers

    Catster has an experienced, expert team of writers, editors, and veterinarians who carefully consider a wide range of parameters when choosing the kitten milk replacers. This includes but is not limited to customer reviews, brand reputation, veterinary experience, hands-on testing, and of course, our cats have a say in the process too! We aim to select and review only the best products available, to help you make the best possible choice and most informed decision for your and your cat’s needs.

    Why Trust Catster?

    A trusted online brand since 2001, Catster has a lot of experience with kitten milk replacers. Our team of cat-loving writers, editors, and veterinarians is dedicated to helping you make the best decision for your precious cats. Our aim is to provide the best information available for cat owners to help cats live their best life possible. To do this, we scour reviews from the most trusted sources available and this, combined with our veterinary team’s experience and expertise, helps us gather the best options available to readers. Our team is deeply invested in the health and welfare of cats the world over, and believes that expert knowledge and veterinary guidance will help you make the right choices—for you and your cats!

    divider cat faces oct 2024

    Conclusion

    PetAg’s KMR Powder Milk Supplement for Kittens is our favorite with its high protein. It’s also highly digestible and contains the important amino acid, taurine. Hartz’s Powdered Milk Replacer Formula for Kittens contains real milk, taurine, omegas, and antioxidants for overall health and muscle growth, and it’s affordable!

    Finally, Nutri-Vet’s Powder Milk Supplement for Kittens is our premium-choice pick because it’s made with whey protein, which includes essential amino acids for overall health.

    Our goal with these reviews is to lead you to the best kitten meal replacer for your kitten. We know how time-consuming caring for a newborn kitten can be, so hopefully, we’ve made your life a little easier.

    See also:


    Featured Image Credit: Adina Voicu, Pixabay

    Want content like this delivered to you?

    Sign Up For Our Newsletter

    News, insights, expert advice, and everything cat

    * By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.




    How useful was this post?

    Click on a star to rate (you can leave written feedback after clicking submit)

    Help us improve Catster for pet parents!

    Your feedback really matters.

    What did you like about this post? Also how can we improve it?

    Join the conversation

    Leave a Reply

    You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.


    Catster's Digital Magazine is Back!

    Vet-approved health & behavior advice

    Real cat stories & community features

    Chatting About Big Cat Tourism, Lion Hunting, and Learning From Our Mistakes | Chatty Cattys, Episode 26

    In this episode of Catster’s Chatty Cattys podcast, Nicole and Dr. Karyn dive into the dark side of big cat tourism and the...

    Why Cats Sit by the Door (But Don’t Go Through It)

    Door-sitting is one of those quirky little habits that almost every cat owner experiences at some point. You know how it goes: a...

    Six Legs Are Better Than Three – How A Tripod Dog and Kitten Found Friendship Through Recovery

    Sometimes the most meaningful friendships begin in the most unexpected places. At a Maryland veterinary hospital operated by Last Chance Animal Rescue, two...

    The Original Space Invaders – Why Zero Respect for Personal Boundaries Is a Good Thing

    Cats have a reputation for being independent, and in many ways they are. But anyone who has tried to work at a laptop...

    More related

    Can You Use Baby Shampoo on a Cat? Feline Shampoo Guide

    Many cats don’t particularly enjoy being bathed, but sometimes it is necessary. Most cats never need shampooing, but if your cat has a...

    My Cat Ate Dental Floss: Is It Dangerous? Our Vet Explains What to Do

    There is no denying that cats are curious creatures. We find them getting themselves into all sorts of mischief, from playing with snakes...

    How to Brush Your Cat’s Teeth: 7 Vet-Approved Steps With Video

    Dental disease is incredibly common in domestic cats, with experts estimating that between 50%–90% of cats over the age of 4 years old...

    What Do Cats Do All Day? 7 Usual Things

    Pet cameras may be all the rage these days, but unless you have one in every room, you won’t constantly have eyes on...

    Keep reading

    Is Gladiolus Poisonous to Cats? Vet Reviewed Advice

    Also known as the “sword lily”, gladiolus is a popular garden flowering plant, though it can adapt to life as a houseplant. If you’re a fan of these elegant, colorful iris family members and are also a cat parent, we...

    Catster_Is Gladiolus Poisonous to Cats

    Cat Hormones: How They Affect Male & Female Felines (Vet-Approved)

    Like humans, cats’ hormones are constantly released by their endocrine system. They regulate a cat’s behavior, moods, and bodily functions. Cat hormones have an essential role in maintaining a cat’s health, including their metabolism, reproductive cycle, development, growth, and behaviors....

    two cats looking at each other

    How to Make a Cat Poop When Constipated: 10 Vet-Verified Tips

    A constipated kitty is no fun. Usually, constipation is not a sign of something serious, though it can be very uncomfortable for the cat and can lead to secondary problems if it isn’t addressed. However, constipation can be a sign...

    constipated cat in the litter box

    Can Cats Eat Bacon? Vet-Reviewed Facts & FAQ

    It’s not a secret that bacon isn’t a particularly healthy food. We often think of bacon as a cut of meat not dissimilar to a steak or pork chop, but it’s not. Bacon is heavily processed, as it goes through...

    Can Cats Eat Bacon

    Siamese Cat Genetics: Does It Affect Siamese Behavior? Temperament Facts

    Talkative, always wanting to be around you, and a bit needy—these are all common traits and behaviors of the Siamese cat. These behaviors don’t apply to every other cat breed, though. Have you ever wondered why cat breeds act in...

    applehead siamese cat sitting

    6 Best Organic Cat Shampoos of 2026 – Reviews & Top Picks

    Some cats are easy to bathe. And some cats turn bath time into a brutal beat down. You probably have a few battle scars to prove it! Some people want the best for their fur baby, even if their cat...

    cleaning cat by shampoo on water bath

    Why Do Cats Like Smelly Stuff? Facts & FAQ

    Dog owners are painfully aware that their pets are often attracted by strong scents. However, many cats also seem to enjoy robust odors, such as dirty laundry or stinky shoes. Have you ever wondered why, especially since cats generally take...

    Cat smelling laundry basket

    Is Catnip Good for Cats’ Digestion? Vet-Reviewed Nutrition Facts & FAQ

    Catnip is an herb related to mint that originated in Asia and Europe. It has green or gray-green leaves, light green stems, and tiny lavender flowers. It’s technically called Nepeta cataria and has long been used in cooking and for...

    cat with green eyes in catnip

    Love Cats? So Do We! Join the Catster Community

    Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.




    Sign up for the Catster Email Newsletter

    Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.