Looking for the best kitten supplements to give your furry friend a healthy start? We’ve researched and compiled a list of top kitten supplements to support their growth, energy, and overall well-being.
Kittens need the best start in life, and that includes top-notch nutrition. Finding the right supplements can make a big difference in their growth and health.
We’ve done the research for you, uncovering the best kitten supplements on the market. From high-calorie gels to nutritious treats, these products are designed to support your kitten’s needs.
Whether your kitten needs a boost in energy, help with weight gain, or immune support, we’ve got you covered. Let’s explore the perfect options to keep your furry friend happy and healthy.
List of Top 10 Kitten Supplements
| Image | Title | Best For | Price |
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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 is perfect for pet owners whose kittens need help gaining weight or maintaining a healthy appetite. It’s ideal for kittens recovering from illness or medical procedures. |
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Under the Weather Pet Electrolytes Ready Cal Plus Gel for Cats | Vet-Formulated High-Calorie Supplement for Cats & Kittens | Promotes Weight Gain & Boosts Energy for Sick Felines | 3.5 Oz Tube Pack |
This high-calorie gel is perfect for cats who need extra energy and nutrition. It’s great for kittens, senior cats, picky eaters, and pets recovering from sickness or surgery. |
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INABA Churu for Kittens, Grain-Free Creamy, Purée Lickable Cat Treats with DHA, EPA, Vitamin E & Taurine, 0.5 Ounces Each, 24 Tubes (4 per Pack), Chicken Recipe |
This product is perfect for kitten owners who want to support their pet’s healthy growth while strengthening their bond. It’s also great for weaning kittens or disguising medications. |
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Hartz Powdered Kitten Milk Replacer Formula – 11Oz |
This kitten milk replacer is perfect for anyone caring for newborn kittens or pregnant and nursing cats. It’s also great for helping sick cats recover. |
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Felisyl L-Lysine Gel for Cats & Kittens (5oz) – Immune System, Respiratory & Eye Health Support. Reduces Sneezing, Runny Nose & Watery Eyes. Daily Salmon-Flavor Supplement – Made in USA (1 Pack) |
Felisyl L-Lysine Gel is perfect for cat owners whose pets need immune, respiratory, or eye health support. It’s ideal for cats with sneezing, runny noses, or watery eyes, especially those prone to feline herpes virus flare-ups or seasonal stress. |
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INABA Churu for Kittens, Lickable, Squeezable Creamy Purée Cat Treat with Green Tea Extract & Taurine, 0.5oz. Each Tube, 20 Tubes, Tuna & Chicken Variety |
INABA Churu for Kittens is perfect for new kitten parents who want to start healthy habits early. These lickable, creamy treats are packed with nutrients and free from grains, preservatives, and artificial colors, making them ideal for kittens under one. Use them to strengthen your bond or as a tasty food topper. |
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Vetoquinol Nutri-Cal 4.25 Oz – High Calorie Supplement for Cats and Dogs |
Vetoquinol Nutri-Cal is perfect for pets who need a little extra help gaining weight or have a low appetite. It’s also a great choice for growing puppies and kittens, as well as hunting and working dogs needing an energy boost. |
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Doctor By Cat Colostrum Protein Cat Supplement Immune Support Muscle Growth, Gentle on Digestion for Kittens, Adult&Senior Cats with Goat Milk, Whey Protein Isolate, Colostrum Lickable Formula |
This cat supplement is perfect for kittens, adult cats, and seniors who need extra immune support and muscle growth. It’s great for picky eaters since it’s easy to serve like a treat. |
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Delectables Squeeze Up Kitten Variety Pack, Creamy Squeezable Puree, Lickable Wet Cat Treats, Grain Free, No Added Fillers, No by-Products, No Added Preservatives, 0.5 Ounces Tube, 20 Tubes Total |
This kitten treat is perfect for cat owners who want to support their kitten’s growth and health. It’s great for hand-feeding and bonding with your kitten. |
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Puyrzoe L-Lysine for Cats Drops – Sneezing, Runny Nose & Watery Eyes Relief, Liquid Cat Lysine Supplement for Immune & Respiratory Support with Taurine & Vitamins, to Boost Energy & Appetite, 60 mL |
Puyrzoe L-Lysine for Cats Drops is perfect for cat owners who want to support their pet’s immune and respiratory health. It’s ideal for cats with sneezing, runny noses, or watery eyes, especially during seasonal changes or stressful times. |
Detailed Reviews
Discover the top 10 kitten supplements that experts and pet parents love. We’ve carefully picked the best options to help your kitten thrive. Get ready to find the perfect fit for your furry friend’s needs. Dive in and see which amazing product will make your kitten purr with happiness!
1. 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’s Ready Cal for Kitten is a high-calorie nutritional supplement designed to help kittens gain and maintain a healthy weight. It’s perfect for kittens that aren’t eating well due to illness or other issues.
This supplement is packed with 10 vitamins, 7 minerals, omega fatty acids, and carbohydrates. These essential nutrients support brain health, coat health, and energy levels, ensuring your kitten grows strong and healthy.
Made in the USA, Ready Cal is veterinary-formulated and free of corn, artificial flavors, and dyes. It’s safe and effective for kittens of all ages.
| Pros | Cons |
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Perfect For:
Under the Weather Pet Ready Cal for Kitten is perfect for pet owners whose kittens need help gaining weight or maintaining a healthy appetite. It’s ideal for kittens recovering from illness or medical procedures.
Ready to Purchase?
2. Under the Weather Pet Electrolytes Ready Cal Plus Gel for Cats | Vet-Formulated High-Calorie Supplement for Cats & Kittens | Promotes Weight Gain & Boosts Energy for Sick Felines | 3.5 Oz Tube Pack

Under the Weather Pet Electrolytes Ready Cal Plus Gel is a vet-formulated supplement for cats. It’s packed with high calories and electrolytes to help cats gain weight and boost energy. The salmon flavor makes it appealing for finicky eaters.
This gel is easy to use and comes in a squeezable tube. Simply apply a small amount to your cat’s lip or paw, and they’ll lick it off. It’s safe for all ages, from kittens to seniors.
Made with all-natural ingredients in the USA, this gel supports your cat’s health. A portion of every sale helps spay/neuter and transport pets in need. It’s a nutritious treat your cat will love.
| Pros | Cons |
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Perfect For:
This high-calorie gel is perfect for cats who need extra energy and nutrition. It’s great for kittens, senior cats, picky eaters, and pets recovering from sickness or surgery.
Ready to Purchase?
3. INABA Churu for Kittens, Grain-Free Creamy, Purée Lickable Cat Treats with DHA, EPA, Vitamin E & Taurine, 0.5 Ounces Each, 24 Tubes (4 per Pack), Chicken Recipe

INABA Churu for Kittens is a grain-free, lickable treat made with wholesome ingredients. It features farm-raised chicken and is packed with essential nutrients for your kitten’s growth.
These treats are low-calorie and high in moisture, perfect for treating and bonding with your kitten. They contain Taurine for healthy vision and heart, and Vitamin E for a strong immune system.
Promotes healthy growth. Free from grains and preservatives. Easy to feed by hand.
| Pros | Cons |
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Perfect For:
This product is perfect for kitten owners who want to support their pet’s healthy growth while strengthening their bond. It’s also great for weaning kittens or disguising medications.
Ready to Purchase?
4. Hartz Powdered Kitten Milk Replacer Formula – 11Oz

Give your newborn kittens the best start with Hartz Powdered Kitten Milk Replacer. It’s a perfect match for mother cat’s milk, ensuring optimal nutrition.
This formula is easy to mix with water. It provides essential nutrients for healthy growth. Your kittens will thrive with this complete diet.
It’s also great for pregnant or nursing cats. And for cats that need extra support. Hartz makes kitten care simple and effective.
| Pros | Cons |
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Perfect For:
This kitten milk replacer is perfect for anyone caring for newborn kittens or pregnant and nursing cats. It’s also great for helping sick cats recover.
Ready to Purchase?
5. Felisyl L-Lysine Gel for Cats & Kittens (5oz) – Immune System, Respiratory & Eye Health Support. Reduces Sneezing, Runny Nose & Watery Eyes. Daily Salmon-Flavor Supplement – Made in USA (1 Pack)

Felisyl L-Lysine Gel is a daily supplement for cats and kittens. It supports immune health and helps with respiratory and eye issues.
This salmon-flavored gel is easy to give. Most cats lick it up willingly. No more pill struggles for you or your pet.
Vet-formulated and NASC certified, it’s safe for all ages. Made in the USA, it’s a trusted choice for pet parents.
| Pros | Cons |
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Perfect For:
Felisyl L-Lysine Gel is perfect for cat owners whose pets need immune, respiratory, or eye health support. It’s ideal for cats with sneezing, runny noses, or watery eyes, especially those prone to feline herpes virus flare-ups or seasonal stress.
Ready to Purchase?
6. INABA Churu for Kittens, Lickable, Squeezable Creamy Purée Cat Treat with Green Tea Extract & Taurine, 0.5oz. Each Tube, 20 Tubes, Tuna & Chicken Variety

INABA Churu for Kittens is a delicious and nutritious treat for your furry friend. Made with real chicken and tuna, it’s a healthy snack they’ll love.
These creamy purées are packed with nutrients like Taurine, Vitamin E, Calcium, DHA, and EPA. They support growth, immunity, and overall health for kittens under one.
No grains, preservatives, or artificial colors. Feed by hand to bond with your kitten. Perfect for weaning or as a food topper.
| Pros | Cons |
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Perfect For:
INABA Churu for Kittens is perfect for new kitten parents who want to start healthy habits early. These lickable, creamy treats are packed with nutrients and free from grains, preservatives, and artificial colors, making them ideal for kittens under one. Use them to strengthen your bond or as a tasty food topper.
Ready to Purchase?
7. Vetoquinol Nutri-Cal 4.25 Oz – High Calorie Supplement for Cats and Dogs

Vetoquinol Nutri-Cal is a high-calorie supplement for cats and dogs. It helps pets gain weight and boosts their energy. This nutritional gel is easy to give and digest.
It’s great for puppies, kittens, and aging pets. The gel stimulates appetite and supports health. It’s also ideal for working dogs needing extra energy.
The gel contains omega-3, omega-6, and multivitamins. It’s tasty and simple to use, helping pets stay healthy and active.
| Pros | Cons |
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Perfect For:
Vetoquinol Nutri-Cal is perfect for pets who need a little extra help gaining weight or have a low appetite. It’s also a great choice for growing puppies and kittens, as well as hunting and working dogs needing an energy boost.
Ready to Purchase?
8. Doctor By Cat Colostrum Protein Cat Supplement Immune Support Muscle Growth, Gentle on Digestion for Kittens, Adult&Senior Cats with Goat Milk, Whey Protein Isolate, Colostrum Lickable Formula

Give your feline friend the ultimate boost with Doctor By Cat Colostrum Protein Supplement! This daily formula is designed to revitalize your cat, supporting their immunity and muscle strength from kittenhood to their golden years.
It’s a treat your cat will love. It’s easy to digest. It helps them bounce back stronger.
| Pros | Cons |
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Perfect For:
This cat supplement is perfect for kittens, adult cats, and seniors who need extra immune support and muscle growth. It’s great for picky eaters since it’s easy to serve like a treat.
Ready to Purchase?
9. Delectables Squeeze Up Kitten Variety Pack, Creamy Squeezable Puree, Lickable Wet Cat Treats, Grain Free, No Added Fillers, No by-Products, No Added Preservatives, 0.5 Ounces Tube, 20 Tubes Total

Delectables Squeeze Up Kitten Variety Pack is a tasty and nutritious treat for your growing kitten. It’s packed with vitamins and minerals to support strong bones and healthy eyes.
This lickable puree is easy to hand-feed, making it a fun way to bond with your kitten. It’s also grain-free and made with premium ingredients you can trust.
Boosts hydration, supports health, and no added fillers. Perfect for your kitten’s growth and happiness.
| Pros | Cons |
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Perfect For:
This kitten treat is perfect for cat owners who want to support their kitten’s growth and health. It’s great for hand-feeding and bonding with your kitten.
Ready to Purchase?
10. Puyrzoe L-Lysine for Cats Drops – Sneezing, Runny Nose & Watery Eyes Relief, Liquid Cat Lysine Supplement for Immune & Respiratory Support with Taurine & Vitamins, to Boost Energy & Appetite, 60 mL

Puyrzoe L-Lysine Drops help cats with sneezing, runny noses, and watery eyes. They also boost energy and appetite. These drops are easy to use and taste good.
The liquid formula is quickly absorbed and simple to give. It has taurine and vitamins for overall health. This makes it a complete daily supplement.
It’s safe for all cats, from kittens to seniors. The natural ingredients are gentle for daily use. Use it long-term for best results.
| Pros | Cons |
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Perfect For:
Puyrzoe L-Lysine for Cats Drops is perfect for cat owners who want to support their pet’s immune and respiratory health. It’s ideal for cats with sneezing, runny noses, or watery eyes, especially during seasonal changes or stressful times.
Ready to Purchase?
Buying Guide
Kittens need the best start in life. Top-notch nutrition is key to their growth and health.
Choosing the right supplements can feel overwhelming. We’ve made it easy with this pro buying guide.
- Nutritional Needs: Kittens need vitamins, minerals, and calories for healthy growth. Look for supplements with essential nutrients like taurine, omega fatty acids, and DHA.
- Age-Appropriate: Ensure the supplement is safe for kittens. Some products are designed for all ages, while others are specific to young cats.
- Form and Flavor: Kittens may prefer gels, treats, or powders. Choose a flavor they’ll love, like salmon or chicken, to make feeding easier.
- Purpose: Decide if your kitten needs weight gain, immune support, or energy boosts. Pick a supplement that matches their specific needs.
- Ingredients: Opt for natural, vet-formulated products. Avoid artificial flavors, dyes, and preservatives for their safety.
- Ease of Use: Look for easy-to-feed options like squeezable tubes or lickable treats. This makes giving supplements stress-free.
- Brand Reputation: Choose trusted brands with positive reviews. Products made in the USA or NASC-certified are often reliable.
- Additional Benefits: Some supplements support hydration, digestion, or bonding. Consider these extras for your kitten’s well-being.
With these tips, you’ll find the perfect supplement to keep your kitten happy and healthy.