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The Best Cat Weight Gain Supplements: Boost Your Cat’s Health

The Pet Institute Review Team
Written By The Pet Institute Review Team
Last updated: Jan 27, 2025, 05:42 AM
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The Best Cat Weight Gain Supplements

Whether your cat is underweight because of age, an illness, or a naturally high metabolism, the right cat weight gain supplements can help them safely increase their body weight. These supplements are rich in high-quality proteins, healthy fats, and essential nutrients to support your pet’s muscle growth and overall health.

Our research, which thoroughly examined factors such as ingredient efficacy, dosage accuracy, and safety standards, found the BestLife4Pets unflavored pills to be the best cat weight gain supplement on the market. It excels by targeting weight management and thyroid support, making it the top choice for concerned cat owners. Learn more about this product, and our other top picks, below.

View all Contents
  • The Best Cat Weight Gain Supplements: A Buyer's Guide
      • Ingredients Matter
      • Caloric Density
      • Palatability
      • Form and Ease of Feeding
      • Veterinarian Approval
      • Brand Reputation
    • Conclusion
  • People Also Asked
  • Your Pet’s Best Interest, Always
  • Contributors
  • Related Reads

Our Top Supplement Picks

  • BestLife4Pets Cat Weight Gain Supplement: Best Overall (Shop Now) →
    Read more about this cat weight gain supplement ↓
  • Lexelium Cat Weight Gain Supplement: Best for Muscle Development (Shop Now) →
    Read more about this cat weight gain supplement ↓
  • Tomlyn Cat Weight Gain Supplement: Best Nutrition Profile (Shop Now) →
    Read more about this cat weight gain supplement ↓
  • Vetoquinol Cat Weight Gain Supplement: Best for Elderly Pets (Shop Now) →
    Read more about this cat weight gain supplement ↓
  • Tiki Pets Cat Weight Gain Supplement: Best for Kittens (Shop Now) →
    Read more about this cat weight gain supplement ↓

The Best Cat Weight Gain Supplements

BestLife4Pets Cat Weight Gain Supplement

Best Overall
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The BestLife4Pets cat weight gain supplement supports your feline friend’s health by addressing hyperthyroidism and weight management. It offers an effective solution, especially for older cats struggling with hyperthyroidism symptoms. By stimulating their appetite, these 400 all-natural, odorless, and tasteless pills encourage cats to consume their meals more readily, leading to healthier weight gain.

Unlike other supplements, this treatment embraces a natural approach, which reassures pet owners concerned about potential side effects from chemical additives. Elderly cats often face challenges in maintaining optimal weight and metabolism due to thyroid issues. This cat weight gain supplement’s active ingredients enhance thyroid function and metabolic support. As a result, you might observe noticeable improvements in your cat’s energy levels and overall health. What sets this product apart is its ability to seamlessly integrate into your cat’s diet without altering the flavor of their favorite foods.

For pet owners seeking a holistic and hassle-free remedy to boost their elderly cat’s health, this supplement emerges as our top choice. It not only aims to manage symptoms effectively but also promotes a balanced lifestyle for your furry companion.

Product Pros
  • Reduces hyperthyroidism symptoms
  • Maintains or increases cat weight
  • Improves fur condition and appearance
Product Cons
  • Loose stool is a potential side effect

Lexelium Cat Weight Gain Supplement

Best for Muscle Development
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Lexelium’s cat weight gain supplement boosts appetite and muscle development in puppies and kittens, making it a compelling choice for pet owners seeking improved health outcomes for their furry companions. This 100% natural pet supplement directly stimulates your pet’s appetite, encouraging them to eat more and thereby steadily gaining weight.  By incorporating this supplement into your pet’s diet, you power their immune system, effectively safeguarding them against common health challenges.

Unlike generic cat weight gain supplements, we like that this formula takes a comprehensive approach by simultaneously targeting immunity and weight issues, resulting in a more robust and lively pet. Users frequently appreciate the ease with which pets accept the supplement, integrating seamlessly into regular feeding routines. The 200g package offers a practical solution for pet owners, ensuring sustained benefits without constant reordering.

When recommending a trusted cat weight gain supplement that promotes both weight gain and muscle development, this one stands out as an effective option. It provides a dual benefit that supports overall vitality in young animals.

Product Pros
  • Powder form supplement
  • Improves energy and muscle mass
  • Easy mixing with no noticeable taste
Product Cons
  • Limited availability for reordering

Tomlyn Cat Weight Gain Supplement

Best Nutrition Profile
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For those seeking a solution to boost their cat’s weight, the Tomlyn cat weight gain supplement emerges as a strong contender. This vet-recommended supplement actively promotes weight gain in cats, especially those struggling with limited food intake. While many products claim to support feline health, this one delivers by efficiently increasing calorie intake. Cats often shy away from regular food, but this supplement engages their interest with its palatable formula, encouraging consistent consumption and ensuring they receive the necessary nutrients.

What sets this cat weight gain supplement apart is its dual role as a nutritional powerhouse and an appetite stimulant. Presented in a convenient 4.25-ounce tube, it easily integrates into any feeding schedule, allowing for fuss-free administration. Moreover, it not only bolsters weight gain but also supports overall feline health, which makes it a versatile addition to your pet care arsenal.

For pet parents looking for a reliable cat weight gain supplement that works effectively and receives veterinary endorsement, this pick is an excellent choice, offering both peace of mind and tangible results.

Product Pros
  • Veterinarian-recommended product
  • Easily digestible for cats
  • Boosts overall cat health
Product Cons
  • Difficult to mix into food

Vetoquinol Cat Weight Gain Supplement

Best for Elderly Pets
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Vetoquinol’s cat weight gain supplement energizes and revitalizes elderly pets by effectively boosting their appetite. This high-calorie supplement targets underweight and nutritionally deficient cats and dogs, helping them regain vitality. It engages pets with its palatable flavor, encouraging even the most finicky eaters to dive into their meals.

In reviews, we noted that many pet owners recommend this cat weight gain supplement for its ability to transform mealtime into an enjoyable experience, thereby improving the quality of life for elderly pets. With consistent use, the supplement invigorates cats, enabling them to maintain a healthy weight and playful demeanor. This product serves as a practical choice for those seeking an efficient appetite stimulant without the need for complex dietary changes. 

If you’re searching for an effective way to boost your pet’s nutritional status, this reliable solution acts decisively to improve furry friends’ lives. It empowers pet owners to actively participate in the care and well-being of their beloved companions.

Product Pros
  • Boosts appetite effectively
  • Provides essential nutrition
  • Gel form for easy digestion
Product Cons
  • Sticky and messy to use

Tiki Pets Cat Weight Gain Supplement

Best for Kittens
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Tiki Pets’ cat weight gain supplement supports kittens in gaining weight and boosting energy. When baby kittens struggle with being underweight, they often experience reduced energy and growth difficulties. This high-protein, high-calorie, and fat-rich supplement addresses these issues by fueling young felines with the vital nutrients they need to thrive.

The mousse format encourages kittens to eat eagerly, ensuring they receive the nourishment necessary for healthy development. As an easy meal supplement or topper, this product integrates seamlessly into a kitten’s diet, offering a hassle-free solution for enhancing their nutrition. The enticing taste ensures even the pickiest eaters engage with their food, allowing pet owners to see noticeable improvements in their kittens’ weight and energy levels. 

If you need a reliable cat weight gain supplement, this one offers an effective and straightforward choice to support your kitten’s health journey. The individual servings simplify portion control, preventing overfeeding and ensuring consistent gains in weight.

Product Pros
  • Encourages weight gain in cats
  • Ideal for picky or sick eaters
  • Easy weaning and transition aid
Product Cons
  • Difficult to open packages

The Best Cat Weight Gain Supplements: A Buyer's Guide

Finding the right cat weight gain supplement can help transform your underweight feline friend into a healthier and more energetic version of themselves. Whether your cat has recently recovered from an illness, is a picky eater, or simply needs an extra boost, a carefully chosen supplement can help bridge the nutritional gaps.

Navigating the realm of feline nutrition might seem complex, but with this guide, you’ll discover how to select the best cat weight gain supplement that matches your pet’s unique needs.

Ingredients Matter

Focus on the ingredient list when examining potential cat weight gain supplements. High-quality proteins should dominate the list, as they build muscle and support overall health. Proteins from sources like chicken, beef, or fish often engage your cat’s taste buds while providing essential amino acids.

Additionally, look for healthy fats such as omega-3 and omega-6 fatty acids, as they contribute to skin health, shinier coats, and energy levels. Vitamins and minerals should also make an appearance, enriching the supplement with nutrients that enhance your cat’s well-being. Pay attention to any fillers or artificial additives that might detract from the nutritional value. Instead of supporting health, these can interfere with digestion and nutrient absorption.

Caloric Density

Ensuring the supplement offers a rich caloric density is crucial for weight gain. Cat weight gain supplements with concentrated calories pack more energy into smaller servings, which is especially useful if your cat has a small appetite. Caloric density encourages weight gain by enabling your cat to consume the necessary energy without needing to eat larger quantities.

Supplements with high caloric content should satisfy your cat’s energy needs, promoting gradual weight gain to help them reach a healthy weight. Consider those that incorporate calorie-dense ingredients like fats and oils, which provide more calories per gram and add to the palatability.

Palatability

A cat weight gain supplement that draws your cat’s interest and appeals to their taste buds increases the likelihood of consistent intake. Cats can be notoriously selective, so choose flavors that align with their preferences, such as chicken, fish, or turkey.

Supplements that enhance flavor with natural ingredients rather than artificial flavors often engage cats more successfully. You might need to experiment with a few options to discover which one stimulates your cat’s appetite. The right supplement should visibly entice your cat, ensuring they consume enough to benefit from its nutritional advantages.

Form and Ease of Feeding

When selecting a cat weight gain supplement, consider the form it takes—powder, liquid, or treats. Each form interacts differently with your cat’s preferences and feeding habits. Powders blend seamlessly with wet food, liquids can mix with water or be dribbled over food, and treats serve as easy, tasty rewards.

Choose a form that integrates effortlessly into your feeding routine. Supplements that fit naturally into your cat’s daily diet facilitate consistent use, minimizing stress for both you and your pet. Observing how your cat responds to different forms will help you decide the best option.

Veterinarian Approval

Before introducing a cat weight gain supplement, consult your veterinarian. Your vet’s insights help determine the specific needs of your cat, particularly if they have underlying health conditions. A supplement that cooperates with your cat’s diet and health profile ensures they receive appropriate nutritional support.

Veterinarians provide guidance on dosage and potential interactions with medications or existing dietary plans. Their professional perspective also reassures you of the supplement’s safety and efficacy, enhancing your confidence in your choice.

Brand Reputation

Choose cat weight gain supplements from brands that demonstrate reliability and trustworthiness. Reputable brands invest in high-quality ingredients and rigorous testing to ensure their products support health claims. Research customer reviews and testimonials to learn from other pet owners’ experiences.

Brands that listen to feedback and strive for continuous improvement often deliver supplements that align with customer expectations. A brand that prioritizes transparency in their sourcing and manufacturing processes also builds trust, making the selection process easier.

Conclusion

Selecting the best cat weight gain supplement involves evaluating several factors that influence your cat’s health and happiness. By focusing on ingredient quality, caloric density, palatability, form, veterinarian approval, and brand reputation, you empower yourself to make an informed decision. Your cat’s journey to weight gain becomes smoother and more enjoyable, leading to a healthier and more vibrant life.

People Also Asked

Are cat weight gain supplements safe for kittens?

Most cat weight gain supplements are safe for kittens, but it's essential to check the product label for age-specific recommendations and consult with a veterinarian to ensure it's appropriate for a kitten's dietary needs.

How long does it take to see results from a cat weight gain supplement?

The time it takes to see noticeable weight gain in your cat can vary depending on the individual cat's metabolism and overall health. Typically, you may see results within a few weeks when used consistently as directed.

Can a cat weight gain supplement be used with other medications or supplements?

Generally, cat weight gain supplements can be used alongside other medications or supplements, but it is crucial to check with your veterinarian to avoid potential interactions or over-supplementation.

What should I do if my cat refuses to eat the cat weight gain supplement?

If your cat refuses to eat the supplement, try mixing it with a small amount of their favorite wet food or a treat. Alternatively, you can experiment with different flavors or forms of the supplement to find one your cat prefers.

Are there any side effects associated with cat weight gain supplements?

While most cats tolerate weight gain supplements well, some may experience digestive issues such as diarrhea or vomiting. If you notice any adverse reactions, discontinue use and consult your veterinarian.

Can overweight cats use a cat weight gain supplement to maintain muscle mass?

Cat weight gain supplements are specifically designed for underweight cats. Overweight cats should not use these products as they may increase calorie intake. Consult with a veterinarian for an appropriate plan to maintain muscle mass without additional weight gain.

Is there a specific diet I should follow while giving my cat a weight gain supplements?

While using a cat weight gain supplement, it's advisable to continue feeding your cat a balanced diet that meets all their nutritional needs. Discuss with your veterinarian to develop a diet plan that complements the supplement for optimal results.

Your Pet’s Best Interest, Always

At Pet Institute, we take pet care seriously. We're dedicated to transparency, impartiality, and the well-being of your pets in every article, review, and recommendation we provide. Our unwavering commitment to these principles ensures that you, our valued reader, always receive reliable and unbiased information. Let us be your trusted guide in the world of pet care and companionship.

Contributors

The Pet Institute Review Team
The Pet Institute Review Team
Pet Health
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