4 Best Dog Weight Loss Supplements for Newfoundlands - iHeartDogs.com

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4 Best Dog Weight Loss Supplements for Newfoundlands

| September 22, 2025
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If your Newfoundland is getting thick in the waistline, maybe it’s time to consider one of the best dog weight loss supplements to help them get back in top form! But just what do dog weight loss supplements do? And are weight loss supplements safe for Newfoundlands?

Dog weight loss supplements should always be used under the supervision of your veterinarian. They know what your pup’s ideal weight should be, as well as any conditions or sensitivities your Newfoundland might have. These supplements are designed to help overweight dogs lose pounds by using ingredients like L-carnitine, inulin, and fiber to improve digestion, support metabolism, and help dogs feel fuller longer.

In addition to our list of favorites, we’ve got answers to some frequently asked questions and what factors to consider when shopping to help you choose the best weight loss supplement for your Newfoundland.

best weight loss supplements for Newfoundlands

FAQs About Weight Loss Supplements for Newfoundlands

1. Are weight loss supplements safe for Newfoundlands?

Weight loss supplements can be safe for Newfoundlands when used correctly and administered under the guidance of a veterinarian. However, as with any supplement or medication, potential risks and side effects should be considered. Additionally, it’s important to use weight loss supplements as directed and follow the recommended dosage guidelines. Overdosing or using a supplement for too long can harm your dog’s health. Choose supplements formulated with safe, natural ingredients and avoid those with fillers, artificial colors, flavors, preservatives, or other questionable ingredients.

2. How do weight loss supplements work?

Weight loss supplements for Newfoundlands support a healthy metabolism, reduce appetite, and promote fat burning. They often contain ingredients such as L-Carnitine, green tea extract, and fiber, which can help boost metabolism, reduce calorie intake, and increase satiety. Some supplements may also include ingredients that support healthy digestion and nutrient absorption. It’s essential to choose a high-quality weight loss supplement designed specifically for dogs and consult with a veterinarian before starting any supplement regimen.

3. What is the fastest way for a dog to lose weight?

A balanced diet and regular exercise are the fastest and healthiest ways for a dog to lose weight. Reducing calorie intake by feeding your Newfoundland high-quality, low-calorie dog food, measuring portions, and consulting your vet are key. Regular exercise, such as walks or playing fetch, is vital to keep your Newfoundland active and burn extra calories. Limiting or eliminating treats is another way to reduce calorie intake. Always consult your veterinarian for a customized weight loss plan that suits your dog’s needs.

4. How do I know if my Newfoundland is overweight?

There are several signs to look for to determine if your Newfoundland is overweight. You may have trouble feeling their ribs, and their body might lack a visible waist when viewed from above. Other signs include low energy levels, difficulty breathing, or joint problems due to excess weight. If you notice any of these signs, consult with a veterinarian to determine your dog’s ideal weight and develop a safe weight-loss plan.

5. Can weight loss supplements replace diet and exercise for my Newfoundlands?

No, weight loss supplements cannot replace a proper diet and exercise for your Newfoundland. While supplements can aid metabolism and fat burning, they are most effective when combined with a balanced diet and regular physical activity. Newfoundlands, being large dogs, require proper nutrition and exercise to maintain a healthy weight. Relying solely on supplements without addressing diet and exercise may lead to ineffective results and potential health issues. Always consult your vet to develop a safe, well-rounded weight loss plan for your dog.

6. How much should I feed my Newfoundland to lose weight?

The amount of food you should feed your Newfoundland to help them lose weight depends on factors like their current weight, age, and activity level. A gradual reduction of 10-20% in daily calorie intake is recommended. This can be achieved by feeding smaller portions or switching to lower-calorie dog food. Always consult with your veterinarian to determine the appropriate amount of food and ensure your dog’s weight loss occurs healthily. Increasing exercise can also help with weight loss.

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Buying Guide: How To Choose The Best Weight Loss Supplement For Newfoundlands

Choosing the best weight loss supplement for your Newfoundland can be challenging, but keeping these factors in mind will help you find the ideal option for your furry one.

Quality Ingredients

Look for a supplement that contains high-quality, natural ingredients that are safe and effective for Newfoundlands. Avoid supplements that contain artificial colors, flavors, preservatives, fillers, or by-products.

Purpose

Different supplements serve different purposes, so choose a supplement designed specifically for weight loss in dogs. Look for supplements that contain ingredients like L-Carnitine, green tea extract, and natural sources of fiber to help support healthy weight loss.

Brand Reputation

Look for a supplement from a reputable brand with a history of producing high-quality dog products. Check online reviews and ratings to see what other pet owners say about the supplement. And don’t forget to ask your vet about dog weight loss supplements, as they most likely have a preferred brand or two.

Supplement Form 

Weight loss dog supplements are available in several forms, including:

  • Capsules or tablets: These are the most common forms of weight loss dog supplements, and they’re easy to administer by adding them to your Newfoundland‘s food or giving them directly.
  • Soft chews: Soft chews are a popular option for dogs who don’t like taking pills. They’re typically flavored and can be given as a treat.
  • Powders: Powders are another option for dog weight loss supplements. They can be mixed into your Newfoundland‘s food and are often flavorless or come in various flavors.
  • Liquid: Some weight loss supplements for dogs are liquid, which can be added to your pup’s water or food. This can be a good option for dogs with trouble swallowing pills.

Regardless of the form, it’s important to follow the instructions on the packaging. Consult with your veterinarian to ensure you’re administering the supplement correctly and appropriately for your Newfoundland‘s specific needs.

Consult With Your Veterinarian

Though we’ve said it before, here’s another reminder to consult with your veterinarian to ensure weight loss supplements are appropriate for your Newfoundland‘s specific needs. And that goes for any new supplement regimen. Your veterinarian can also help you choose the correct dosage and provide guidance on how to monitor your dog’s progress.

Cost

Finally, consider the supplement’s cost and ensure it fits your budget. Note that cheaper supplements may not be as effective, so it may be worth investing in a higher-quality product to get the best results for your dog.

best weight loss supplements for dogs

Best Newfoundland Dog Supplements

#1 – SlimPaws Healthy Weight Soft Chews for Dogs 

weight loss supplements for dogs

SlimPaws Healthy Weight Soft Chews offers your dog a natural and gentle way to lose weight using a proprietary Fat Fighter™ Blend that lessens fat build-up, promotes lean muscle mass, improves metabolism, burns fat, and enhances glucose distribution. A special active ingredient that blends Leucine and Pyroidoxine (B6) also stops the conversion of food to fat. On average, dogs who use these soft chews see a twenty percent reduction in body weight in just twelve weeks.

 Key Features 

  • Made with human-grade ingredients like chicken, carrots, blueberries, and flaxseed
  • Formulated for dogs of all sizes
  • Made in the USA with ingredients from the USA and EU

Pros

  • Natural chicken flavor
  • All natural, human-food-grade ingredients
  • Easy to feed soft chew

Cons

  • Some dogs may experience tummy upset


#2 – Doc Hoag’s Aloe Vera

 

A holistic approach to weight loss, Doc Hoag’s Aloe Vera + Agave Natural Holistic Dog Supplements are high in fiber, prebiotics, antioxidants, and anti-inflammatory properties thanks to organic aloe vera and blue agave inulin. This easy-to-use liquid supports digestive health, improves skin and fur, and soothes anxiety and irritability. Simply add this clear and flavorless liquid to food or water. Sourced and made in the USA.

Key Features

  • Natural and holistic dog supplements for weight loss, gastrointestinal relief, and digestive remedy
  • Blue Agave Inulin provides a palatable source of fiber & prebiotic
  • Clear, odorless, and tasteless
  • Can be used in dogs, cats, and other small animals

Pros

  • Veterinarian-made
  • 100% kosher and organic aloe vera
  • Premium quality, aloin-free, intact polysaccharides
  • Included pump
  • Affordable pricing
  • Grown and made in the USA

Cons

  • May make dry food kibble mushy; better for wet food


#3 – Wolf Spring Liquid Weight Management

weight loss supplements for dogs

Wolf Spring Liquid Weight Management Dog Food Topper ensures every ingredient in their weight loss liquid helps in your dog’s quest to shed some pounds. L-Carnitine supports fat burn, L-Taurine helps energy metabolism, and inulin promotes fullness and good digestive health. Just pour the appropriate dose over your pup’s food to help them on their weight loss journey. And once opened, Wolf Spring can be kept in the fridge for up to three days when serving smaller portions to dogs.

Key Features

  • L-carnitine, L-taurine, and inulin create a powerful fat-burning trio
  • Coconut water boosts hydration and supports heart health
  • Glucosamine helps hips and joints
  • Simply pour over dog food to serve
  • Made in the USA

Pros

  • Formulas are natural and grain-free
  • Aids digestion
  • Delicious natural taste
  • Developed by veterinarians
  • Available in 6, 12, and 24-packs

Cons

  • On the smelly side

Related: Best Salmon Oil Supplements for Dogs


#4 – GNC Pets Advanced Weight Support Dog Supplement

GNC Pets Advanced Weight Support Dog Supplements is designed to help support healthy weight management in dogs. Great for Newfoundlands who don’t like pills or liquids, these soft chews support metabolic function and improve weight management using a special blend of premium ingredients, including white bean extract, digestive enzymes, and probiotics. White bean extract has been shown to help enhance energy, improve stamina, and reduce high cholesterol. And because GNC makes their dog supplements with the same premium ingredients, quality, and care as the products for their parents, you can trust them to deliver a safe product your Newfoundland will happily eat. This container of 90 chicken-flavored soft chews provides adult dogs with the advanced support they need to complement weight management efforts.

Key Features

  • Made with 500mg of white bean extract to aid energy, stamina, and cholesterol levels
  • Formulated to support metabolic function and improve weight management
  • Wheat-free formula makes digestion easier on sensitive stomachs
  • Essential fatty acids help support healthy skin and coat
  • For adult dogs over a year old
  • Made in the USA

Pros

  • Wheat free with no stimulants
  • Easy to feed
  • Rich in Omega-3 fatty acids
  • Chicken flavor dogs love

Cons

  • Strong odor


best weight loss supplements for dogs

Support Your Newfoundland Dog’s Weight Loss Journey

Let our list of dog weight loss supplements help you get your Newfoundland back in shape and feeling good! Along with a healthy diet and plenty of exercise, any of these supplement options can aid your dog in their weight-loss journey. But, as always, talk to your veterinarian before starting any new supplement regimen for your dog.

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