Red Flags in Your Dog's Food: Dog Food Ingredients to Avoid
- Ryan Rothon
- Jan 23
- 4 min read
You shouldn't need a degree in chemistry to choose a good dog food. Yet dog food ingredients lists are becoming even more complex and hard to understand. Between the chemical formulas, hieroglyphics and marketing speak many are left wondering:“ Is this actually good for my dog”
The truth is simple: Not every controversial ingredient is dangerous, but some ingredients are clear red flags that often indicate poor-quality nutrition, heavy processing, or cost-cutting.
This guide breaks down which dog food ingredients to watch out for, why they matter, and how to confidently read a label without fear or confusion.
How to read a dog food label (It is all in the details)
Before jumping into specific red flags in your dog food, it’s important to understand how dog food labels work, because they can be hard to truly understand.
Key things to know:
Ingredients are often listed by weight before cooking: This means fresh meats (which are mostly water) may appear higher than they truly are nutritionally.
Ingredient splitting is common: For example, maize + corn gluten + corn meal may be listed separately to disguise how much corn is really used.
Legal ≠ optimal: Many low-quality ingredients are legally allowed but nutritionally questionable.
Once you know this, red flags become much easier to spot. We have an entire in-depth guide on decoding dog food labels in this article.
🚩 Category 1: Vague or Unnamed Protein Sources
High-quality dog food should clearly state where protein comes from. Vague wording is one of the biggest warning signs.
Red flag ingredients include:
Meat and animal derivatives
Animal by-products
Poultry meal (without naming chicken, turkey, etc.)
Hydrolysed animal protein (unnamed source)
Why this matters:
You don’t know which animal is used
Quality and digestibility can vary wildly
Can be associated with lower-grade raw materials
✅ Better choice: Clearly named proteins like chicken, pork, lamb, or salmon.
🚩 Category 2: Excessive Fillers With Little Nutritional Value
Dogs need carbohydrates (it is a vital part of a balanced diet) but quality and quantity matter.
Common filler red flags:
maize
wheat
soy
white rice (brown rice does have many known nutritional benefits)
Rice bran (not whole rice)
Cellulose (plant fibre used for bulk)
Why they’re used:
Generally cheaper
To bulk out the food
To boost crude protein numbers without adding meat
In most European pet foods they are likely listed as "maize flour", "rice flour", "wheat", "potato starch", "cereals", "derivatives of vegetable origin"
In small amounts, they can be acceptable. When they are too high in the ingredient list, they suggest lower nutrition.
🚩 Category 3: Artificial Preservatives, Colours & Flavourings
This is one of the clearest red-flag categories, and thankfully, easy to identify.
Ingredients to avoid:
BHA
BHT
Ethoxyquin (illegal in Europe)
Propyl Gallate (E310)
Artificial colours (E102, E110, Blue 2, etc.)
Artificial flavourings (basically anything that mentions colour or flavouring is a red flag)
Why this matters:
These additives are used to extend shelf life and improve palatability
They usually offer no nutritional benefit
Many modern, premium foods avoid them entirely
✅ Better alternatives: Natural preservatives like mixed tocopherols (vitamin E) or rosemary extract.
🚩 Category 4: Added Sugars & Palatability Enhancers
Dogs do not need sugar! But in some foods it can come from a wide range of sources (corn/maize, wheat, sugar cane, sugar beet etc)
Red flag ingredients include:
Sugar
Glucose syrup
Sucrose
Molasses
Caramel
“Digest” or animal digest sprays
Why they’re added:
To improve taste
To encourage picky dogs to eat
To mask inferior ingredients
Over time, added sugars can contribute to weight gain, poor gut health, and unstable energy levels.
🚩 Category 5: High Ash or Mineral Content
Ash content is often listed on dog foods, but it can be easy to ignore and hard to understand. But it is a very telling stat!
What is “ash”?
Ash represents the total mineral residue left after the food is burned in lab analysis.
When ash becomes a red flag:
Very high ash levels can indicate excessive bone content (above 9% - 6-8% is good/normal)
Poor-quality mineral sources may be harder to absorb
Can contribute to digestive issues in sensitive dogs
💡 Tip: Ash isn’t always listed, but extremely cheap foods often have higher levels.
Important Context: One Ingredient Never Tells the Full Story
Always considers:
Ingredient quality and source
Ingredient proportion
Processing method (extruded vs cold pressed)
Overall diet balance
An ingredient that’s fine in small amounts can become problematic when overused, and vice versa.
This balanced view protects you from marketing tactics and helps you make confident decisions. For more information on exactly what you should be looking to feed your dog, check out our comprehensive guide on dog nutrition (including what foods your dog can and should eat)
A Quick Dog Food Label Checklist 🐶
When choosing a dog food, look for:
✅ Green Flags
Named meat or fish as primary protein
Clear, recognisable ingredients
No artificial preservatives or colours
Transparent formulation (are the percentages clear?)
❌ Red Flags
Vague animal derivatives
Artificial additives
Added sugars
Heavy use of fillers
Unclear sourcing
Why Ingredient Transparency Matters
High-quality dog foods don’t rely on tricks.They don’t need vague wording, chemical additives, or artificial flavourings. That's because the ingredients speak for themselves.
That’s why thoughtfully formulated foods focus on:
Named protein sources
Minimal, functional ingredients
Gentle processing that preserves nutrients
Your dog’s food should be nourishing, not confusing.
Why not try one today?
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