Most dog owners don’t realise this…
Not every ingredient in dog food is there to nourish your dog.
Some are added simply to bulk out the food — often referred to as fillers or binders.
These can include things like processed grains, starches, or lower-quality ingredients used to hold kibble together or reduce cost.
They’re not always harmful — but they’re not always helpful either.
And for dogs with sensitive stomachs, itchy skin, or recurring ear issues, these ingredients can sometimes make things worse.
That’s why it’s worth taking a closer look at what’s actually in your dog’s bowl.
What are fillers and binders in dog food?
Fillers are ingredients used to add volume to food without providing much nutritional value.
Binders are used to hold the food together — especially in dry kibble.
In many cases, they’re included to make production easier or cheaper, rather than to support your dog’s health.
Why this matters for your dog
If your dog is thriving, you may never need to think about this.
But if you’ve noticed things like:
- constant scratching
- licking paws
- digestive issues
- dull coat
…it might not just be “one of those things”.
Food can play a bigger role than most people realise.
A simpler approach
At Harley & Marley, we take a very straightforward approach to dog food:
If an ingredient doesn’t benefit your dog, it doesn’t go in.
That means:
- no fillers
- no binders
- no unnecessary bulk ingredients
Instead, we focus on natural, high-quality ingredients and fish-based nutrition that supports dogs from the inside out.
If you’ve ever wondered whether your dog’s food is really working for them, it might be worth exploring something simpler.
You can learn more about our approach or try a sample whenever it suits.
We’re always happy to help if you’re unsure what’s best for your dog.
— Portia at Harley & Marley
What are Fillers?
Fillers in dog food are inexpensive ingredients added to increase volume or lower manufacturing costs. While often used as cheap carbohydrate or fiber sources, they typically provide minimal nutritional value compared to premium animal proteins.
Common Ingredients Used as Fillers
-
Corn and Wheat: Frequently used as cheap binders and energy sources, but they are common triggers for food sensitivities in dogs. -
Soy: A cheap protein substitute that offers volume but can cause digestive issues or allergic reactions. -
Rice Bran & Brewer's Rice: By-products of the rice milling process that lack the whole-grain nutrients found in standard rice. -
Cellulose: Essentially plant or wood fiber used purely to add bulk and create the feeling of fullness.
The "Filler" Debate
While consumer advocates warn that fillers dilute a dog's diet and force them to overeat, many veterinary nutritionists argue that these ingredients aren't legally defined as "fillers". Properly processed grains and plant fibers can provide essential energy, fatty acids, and gut-healthy fiber.
How to Spot Them on Labels
To identify higher-quality dog food, read the "Guaranteed Analysis" and ingredient lists carefully:
- Look for named meats (e.g., "chicken" or "salmon") at the very top of the ingredient list, rather than grains or "meat by-products".
- Avoid vague labels like "animal meal" or "cereal derivatives," which often signal lower-quality or mystery ingredients.
- Consult your vet to ensure your pet's specific dietary needs are met.
