The omega-3 figure on the guaranteed analysis is measured at production — not at the time your dog eats the food. Processing temperature, oxidation during storage, and fat matrix composition all determine how much EPA and DHA actually reaches your dog. Here is what bioavailability means in practice.
What Omega-3 Bioavailability Means
Bioavailability is the proportion of a nutrient that is absorbed from food and made available for physiological use. A dog food that lists 1.8% omega-3 on the guaranteed analysis is not delivering 1.8% omega-3 to every cell that needs it. It is delivering a percentage of that figure — determined by the form of the fatty acid, its oxidative state at the time of consumption, and the dog’s individual digestive capacity. The gap between the stated value and the absorbed value is what bioavailability describes. For omega-3 fatty acids specifically, this gap is wider than for most other nutrients, because EPA and DHA are chemically unstable and degrade at multiple points between manufacturing and consumption.
EPA and DHA: The Two Forms That Matter
Not all omega-3 fatty acids are equal in function. ALA (alpha-linolenic acid) is a plant-derived omega-3. Dogs can theoretically convert ALA to EPA and DHA, but the conversion rate in canines is poor — estimated at less than 15% for EPA and lower still for DHA. ALA is not a reliable omega-3 source for dogs.
EPA (eicosapentaenoic acid) supports immune function, inflammatory regulation, and cardiovascular health. DHA (docosahexaenoic acid) is critical for neurological function, retinal development, and coat quality. In puppies, adequate DHA during development has direct implications for brain structure. In adult dogs, it supports cognitive function and skin barrier integrity. Both come primarily from marine sources.
What Affects How Much Your Dog Actually Absorbs
Four factors determine bioavailability from the point of manufacture to the point of digestion: processing temperature (EPA and DHA oxidise readily under heat — standard extrusion at 110–160°C creates conditions for rapid oxidation); oxidative state at consumption (omega-3s continue to oxidise after manufacturing, throughout storage and after the bag is opened); presence of natural antioxidants (tocopherols act as antioxidant stabilisers that slow oxidation); and fat matrix composition (the overall fat matrix in the diet influences how completely EPA and DHA are extracted in the small intestine).
Oxidation: The Bioavailability Problem That Isn’t on the Label
The guaranteed analysis on a dog food bag reflects the omega-3 content at time of production testing. It does not reflect oxidative state at time of purchase, or at time of feeding. Lipid peroxidation is measurable — via peroxide value (PV) and thiobarbituric acid reactive substances (TBARS) — but these values are not disclosed on consumer labels anywhere in the industry.
The practical implication: two products with identical omega-3 minimums on the guaranteed analysis can deliver substantially different amounts of functional EPA and DHA to the dog consuming them, depending entirely on how those fatty acids were treated during and after processing.
What the Omega-3 Percentage on the Bag Is Actually Measuring
When you read ‘1.8% omega-3 minimum’ on a guaranteed analysis, that figure represents total omega-3 fatty acid content (EPA + DHA + ALA combined in most cases), measured at time of production analysis, in a non-oxidised state at the moment of testing. It does not represent the proportion your dog absorbs, does not separate EPA and DHA from ALA, does not account for shelf-life oxidation, and does not distinguish between omega-3 in a chemically stable versus a degraded state.
How RawFusion Addresses the Oxidation Problem
The Canine Plus+ RawFusion process was designed, in part, to preserve the omega-3 fraction through manufacturing rather than restore it through post-processing addition. Standard manufacturing uses post-extrusion fat coating to recover the omega-3 value after heat exposure. RawFusion operates at controlled lower temperatures with reduced oxygen exposure during critical processing stages, with the objective of keeping the EPA and DHA profile intact from ingredient to finished kibble.
Canine Plus+ Balance lists 1.8% omega-3 minimum. Canine Plus+ Vitality, formulated for senior dogs where joint and cognitive support is a higher priority, lists 2.2% omega-3 minimum.
Frequently Asked Questions
How much EPA and DHA does my dog need daily? As a general reference, the National Research Council suggests a combined EPA + DHA intake of approximately 30mg per kg of body weight per day for adult maintenance. Dogs with inflammatory conditions or joint disease are often managed at higher therapeutic doses under veterinary guidance.
Can a dog get enough omega-3 from plant sources? Not reliably. The conversion of ALA to EPA and DHA in dogs is inefficient — typically below 15% for EPA and substantially lower for DHA. Marine-source omega-3 is the functional form for canine dietary needs.
How can I tell if the omega-3 in my dog’s food has oxidised? Rancidity in the fat fraction is sometimes detectable as an off or stale smell from the kibble. However, oxidation at levels that reduce bioavailability can occur before smell is perceptible. Storing kibble in a sealed, cool, dark environment and consuming within 6 weeks of opening reduces oxidation rate after purchase.
Why does Vitality have more omega-3 than Balance? Canine Plus+ Vitality is formulated for senior dogs, where omega-3 plays an elevated role in joint support and cognitive maintenance. The 2.2% minimum versus 1.8% in Balance reflects a formulation decision based on the specific physiological needs of dogs in their senior years.