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6 Great Sources of Fiber for Dogs (& How Much They Need Daily)

dog eating apple

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Dr. Paola Cuevas Photo

Reviewed & Fact-Checked By

Dr. Paola Cuevas

Vet, MVZ

The information is current and up-to-date in accordance with the latest veterinarian research.

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Although fiber is not considered an essential nutrient because it can not be digested, it is an essential component of a dog’s diet that plays a very important role in the digestive system’s health. Although most dog food has some form of fiber, some dogs don’t have enough in their diets and need a little boost. Thankfully, there are many great sources of fiber, both soluble and insoluble. If you’re looking for ways to sneak some extra fiber into your dog’s daily meals, here are six great sources to try:

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The 6 Great Sources of Fiber for Dogs

1. Pumpkin Pulp

pumpkin flesh and seeds_M W_Pixabay
Image Credit: M W, Pixabay
Source: Natural
Fiber Type: Soluble, Insoluble
Pumpkin Pulp Nutritional Info (¼ cup / 4 tablespoons):
  • 24 calories
  • Fiber: 2g
  • Protein: 0.5g
  • Fat: 0.5g
  • Carbohydrates: 5.5g
Serving Size for Dogs:
  • Toy/Small dogs:  ¼ –1 tablespoon
  • Medium dogs: ½–2 tbsp
  • Large/Giant: 1–4 tbsp.

Pumpkin Pulp is one of the best sources of dietary fiber for dogs, cats, and also humans. It’s rich in flavor that most dogs enjoy, making it easy to incorporate into your dog’s diet. Pumpkin is a superfood that is nutrient-dense and low in calories, which is why it’s arguably the most popular natural source of fiber. Make sure that you are buying organic canned pumpkin pulp and not pumpkin pie filling. Pumpkin pie filling has little to no nutritional value and is loaded with sugar.


2. Green Beans

green beans
Image Credit: pixel1, Pixabay
Source: Natural
Fiber Type: Soluble, Insoluble
Green Beans Nutritional Info (½ cup):
  • 16 calories
  • Fiber: 1.7g
  • Protein: 0.9g
  • Fat: 0.0g
  • Carbohydrates: 3.5g
  • Serving Size for Dogs: Feed once or twice a day. Start with around 10% of your dog’s meal and watch for any changes. Increase to no more than 20% of your dog’s meal. Consult with your veterinarian if you’re not sure how much your dog needs.

*NOTE: This is to supplement your dog’s food for fiber, not the Green Bean Diet for overweight dogs.*

One of the healthiest ways to add fiber to your dog’s diet, green beans are affordable, natural, and low in calories. They also contain other essential nutrients your dog needs, like Vitamin C, Iron, and Vitamins B1, B3, and B6. Green beans are also a great alternative to treats if you’re looking to swap out the biscuits instead. Dogs can eat cooked, raw, and canned green beans, so you can choose the option that your dog likes the most. Avoid green beans cooked in oils, butter, spices, and salt to avoid potential health problems.

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3. Ground Flaxseed

flax seed
Image Credit: Maryna Osadcha, Shutterstock
Source: Natural, Processed
Fiber Type: Soluble, Insoluble
Ground Flaxseed Nutritional Info (1 tbsp):
  • 37 calories
  • Fiber: 1.9g
  • Protein: 1.2g
  • Fat: 3.9 g
  • Carbohydrates: 2.8g
Serving Size for Dogs
  • Toy-Miniature Dogs: 1/8–¼ tsp
  • Small Dogs: ¼ tsp–1 tsp
  • Medium Dogs: 1 tsp–1½ tbsp
  • Large-Giant Dogs: 1-2 tbsp

*NOTE: Consult with your veterinarian first before adding flaxseed to your dog’s diet, especially dogs with thyroid, heart, and diabetic conditions.

A powerful superfood, ground flaxseed can be a total game-changer for your dog’s diet. Rich in dietary fiber, ground flaxseed also contains other vitamins and minerals to help keep your dog healthy and active. It can also help your dog’s skin and coat due to the naturally-occurring Omega-3 and Omega-6 fatty acids. Although coming from the same plant, flaxseed oil is not as fiber-dense as ground flaxseed. Never feed your dog raw or unprocessed flaxseed- always buy organic, processed flaxseed meal to prevent potential health issues.


4. Apples

apple slices
Image Credit: PublicDomainPictures, Pixabay
Source: Natural
Fiber Type: Soluble(fruit), Insoluble(skin)
1 Medium Apple (182g) Nutritional Info:
  • 95 calories
  • Fiber: 4.4g
  • Protein: 0.5g
  • Fat: 0.3g
  • Carbohydrates: 25g
  • Sugar: 19g
Serving Size:
  • Start with small portions as some fruits may cause indigestion. 1 or 2 small cubes of apples to start, especially with toy and small breeds. For larger dogs, start with 1 full slice and feed no more than ½ apple a day. Consult with a veterinarian first since apples are high in sugar.

Crisp in taste and refreshingly juicy, apples are another great source of fiber for dogs. They’re low in fat and high in fiber, containing over 4g of dietary fiber in one medium-sized apple. Apples are nutrient-dense fruits that can add additional benefits for your dog as well, but they’re also a high-sugar food that may not be the best option for dogs with thyroid, obesity, and diabetic issues. Look for organic apples to lessen the number of pesticides your dog ingests.


5. Wheat Germ

Wheat Germ
Image Credit: joanna wnuk, Shutterstock
Source: Natural, Processed
Fiber Type: Insoluble
Wheat Germ Nutritional Info (1 tbsp):
  • 31 calories
  • Fiber: 1g
  • Protein: 2.6g
  • Fat: 0.8g
  • Carbohydrates: 4g
Serving Size:
  • Toy/Miniature Dogs: ⅛–¼ tsp
  • Small Dogs: ¼ tsp–1 tsp
  • Medium Dogs:  1½ tsp–1 tbsp
  • Large/Giant Dogs: 1-2 tbsp

A great source of insoluble fiber, wheat germ is another nutrient-heavy grain product with great health benefits. The name refers to the reproductive part of the seed of the wheat plant that helps create new wheat plants, a natural by-product of grain mills after processing wheat. It also contains magnesium and phosphorous, which are also important for a balanced diet. Wheat germ is also a great alternative to ground flaxseed meal if it’s too strong for your dog’s digestive system.


6. Zesty Paws Core Elements Probiotic Soft Chews Digestive Supplement for Dogs

Zesty Paws Core Elements Probiotic Soft Chews Digestive Supplement for Dogs

Source: Supplement
Fiber Type: Soluble/Insoluble
  • Active Ingredients: Pumpkin, Papaya, Total Microbial Count (Lactobacillus Acidophilus, Lactobacillus Plantarum, Lactobacillus Brevis, Lactobacillus Fermentum, Lactococcus Lactis), GanedenBC30 (Bacillus Coagulans GB!-30, 6086).
  • Inactive Ingredients: Pea Flour, Palm Fruit Oil, Garbanzo Flour, Tapioca Flour, Flaxseed Meal, Sunflower Lecithin, Natural Vegetable Flavoring, Coconut Glycerin, Rosemary Extract, Mixed Tocopherols, Sorbic Acid (Natural Preservative).
Serving Size:
  • 0–25 lbs: 1 supplement chew
  • 26–75 lbs: 2 supplement chews
  • 76+lbs: 3 chews. Do not exceed 3 chews per day.

Zesty Paws Core Digestive Supplement chews are soft-chew supplements that contain pumpkin and flaxseed, two great natural sources of fiber in one small chewable pill. These chews also have probiotics and other nutrients to support overall gut health, which can help regulate your dog’s digestive system. If pumpkin alone isn’t working, the Zesty Paws Digestive chews may be a better alternative for your dog. Consult with your veterinarian before starting any new supplements first.

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Fiber: Why is it Important for Dogs?

Fiber is a very important component of a dog’s diet. It is crucial for healthy digestion. It helps bulking and to pass the stool in dogs and humans alike. Moreover, some kinds of fiber are prebiotics, which means that they help feed and maintain the “good bacteria” of the digestive system.

Although most dog foods contain fiber, some recipes simply don’t offer enough to benefit your dog. Dogs that have a fiber deficiency usually have either very loose, liquid-like stool or multiple bouts of constipation, but your veterinarian is the best bet for a true deficiency diagnosis.

Fiber comes in two forms: soluble and insoluble fiber. Soluble fiber dissolves in water or liquid, turning into a gel-like substance in the colon that slows down and helps regulate digestion. Insoluble fiber does not dissolve at all, but it actually helps bulk and aids in passing the stool. Both forms of fiber are important for normal digestion and gut health, so it’s important that your dog consumes them regularly.

How Much Fiber Does my Dog Need?

Dogs of all shapes and sizes need fiber, but the amount will depend on your dog’s size and how much fiber is in the diet already. A healthy diet should consist of around 2-4% dietary fiber, though 5% may be necessary for dogs who struggle with digestive issues. Again, it’s crucial to talk to your vet about diet and nutrition, especially if you plan on adding fiber to your dog’s diet.

Natural Sources vs. Supplements

Fiber is easy to obtain through natural sources like grains and fruits, but it may not be enough for your dog’s specific needs. The topic of natural versus supplement is a hot debate in the pet industry. While natural sources of fiber are great on their own, supplements can benefit your dog’s health. When it comes to supplements for your dog, we highly recommend talking to a veterinarian with a focus on nutrition. Every dog has its own dietary needs, so it’s best to ask your vet and do what’s best for your dog.

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Conclusion

Dietary fiber plays an important role in gut health and dog nutrition, but not all dog food contains enough to provide those benefits. There are plenty of ways to add extra fiber while also providing your dog with other potential health benefits. As long as you watch for signs of indigestion and don’t overload your dog’s system with too much fiber, your dog may benefit from a boost of fiber.


Featured Image Credit: Agnes Kantaruk, Shutterstock

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