What Does Low Fat Actually Mean in Dog Food?
Dog food labels can be incredibly confusing, especially if your dog has specific dietary requirements such as pancreatitis.
Finding genuinely low fat foods can be difficult because labels usually show “as fed” nutritional values rather than Dry Matter Basis (DMB), which can make foods appear lower in fat than they actually are.
What Does “Low Fat” Actually Mean?
“Low fat” is used both as a marketing term and for genuine medical dietary needs, which can make things confusing for owners.
There are currently no strict regulations defining what can officially be labelled as “low fat” in pet food.
For dogs with conditions such as pancreatitis, it is often recommended that diets remain below 10% fat on a Dry Matter Basis (DMB). However, every dog is individual and dietary changes should always be discussed with your vet.
What Is Dry Matter Basis (DMB)?
Dry Matter Basis is a way of comparing foods once all moisture has been removed.
Foods with high moisture contents, especially wet foods, can appear lower in fat because the water dilutes the nutritional analysis.
Using DMB allows foods and treats to be compared more accurately.
Why Wet Foods Can Be Misleading
Wet foods are often the most confusing because of their high moisture content.
For example:
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Fat: 3%
-
Moisture: 80%
This may sound very low fat, but once converted to Dry Matter Basis, the fat content is actually 15%.
You can see how confusing this can become, especially for owners trying to follow a strict low fat diet.
I personally made this mistake with my own dog who suffers from pancreatitis. I assumed that because her wet food said 5% fat, it was suitable. However, once converted to DMB, the fat content was actually over 20%.
I only realised this after my dog experienced another pancreatitis flare up and I researched canine nutrition more deeply.
How To Calculate Dry Matter Basis
You can calculate the Dry Matter Basis of any food or treat using this formula:
Step 1: 100 - moisture content
Step 2: nutritional value ÷ answer to step one
Step 3: multiply by 100
Example
-
Fat: 3%
-
Moisture: 80%
Step 1:
100 - 80 = 20
Step 2:
3 ÷ 20 = 0.15
Step 3:
0.15 × 100 = 15
Final DMB fat content = 15%
Dogs That May Need Lower Fat Diets
Some dogs may benefit from lower fat diets, including dogs with:
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pancreatitis
-
weight management needs
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sensitive digestion
Always speak to your vet before changing your dog’s diet.
Common Mistakes Owners Make
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Only checking the “as fed” nutritional analysis
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Assuming proteins such as chicken or fish are automatically low fat
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Feeding low fat meals but high fat treats
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Forgetting to include chews and enrichment in overall fat intake
Final Thoughts
Every dog is individual and dietary changes should always be discussed with your vet.
If your dog requires a lower fat diet, always:
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check the full nutritional analysis
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convert foods to Dry Matter Basis
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transition foods gradually
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monitor your dog closely
We aim to make shopping for dietary needs easier with dedicated low fat sections on our website.