Harley & Marley Finest Fish Oil
Supplement · complementaryClear label
Our verdict
Is Harley & Marley Finest Fish Oil a good dog food?
This is a supplement, not a complete diet, so it is not scored on our 1-100 scale. The ingredient breakdown below shows what is in it; a supplement should be fed alongside, not instead of, a complete diet.
Complementary supplement for dogs of all life stages, with salmon oil, mackerel and whiting as the main ingredients.
30% of this recipe has no printed percentage. Estimated shares are model estimates, not label facts.
Who is this food for?
Suits
- Labelled by the manufacturer for all lifestages
- Grain-free: no grain ingredients listed
- Single named protein: fish
- Doesn't list chicken, beef, turkey, lamb, venison, pork, duck as ingredients
These points are derived from declared ingredients and analysis, not a substitute for veterinary advice. If your dog has a diagnosed condition, food choice is a medical nutrition decision: speak to your vet. Find foods that fit your dog.
Nutrition and feeding
Typical analysis (as fed)
| Nutrient | As fed |
|---|---|
| Omega-3 fatty acids | 16.50% |
| Omega-6 fatty acids | 13% |
Additives & feeding info
Additives declared on the label
Technological additives
Antioxidants 0.5%
Ingredients (4)30% of the recipe is estimated
Estimated composition
- oil 70.0%
- meat 29.5%
- additive 0.5%
| # | As declared | Matched | Label reading | Declared % | Est. % |
|---|---|---|---|---|---|
| 1 | Salmon Oil (Minimum 70%) | Salmon Oil | oil · good | 70 | 70.0 |
| 2 | Mackerel Oil (5-15%) | Mackerel | meat · good | - | 16.9 |
| 3 | Blue Whiting Oil (5-15%) | Whiting | meat · good | - | 12.6 |
| 4 | Antioxidants 0.5% | Antioxidants | additive · medium | 0.5 | 0.5 |
- 1. Salmon Oil (Minimum 70%)70% declared70.0% estimated
- 2. Mackerel Oil (5-15%)16.9% estimated
- 3. Blue Whiting Oil (5-15%)12.6% estimated
- 4. Antioxidants 0.5%0.5% declared0.5% estimated
Trust and sourceNo recalls recorded in our database · checked 2026-08-22
Brand and contact: Harley & Marley
- Social
Trust and provenance
- Recall history
- No recalls recorded in our database
- Label data last checked
- 2026-08-22
- Product page
- www.harleyandmarley.co.uk
Recall history is presentation-only and never affects the score. Dates are when we recorded the data, not when the manufacturer last changed the recipe.
Spotted a mistake in this listing? Report it here and we'll take a look.
Score details and methodologyCalculations, history and evidence
Recipe: how the 1-100 score is calculated
Scored with model v3 on 2026-10-25. Each component is the feature value for this product multiplied by the model's published coefficient.
| Component | Input | Coefficient | Contribution |
|---|---|---|---|
| Base score | - | 30.909 | +30.91 |
| Average ingredient quality | 1.0 | 9.191 | +9.16 |
| Oil share of dry matter | 88.8% | -0.092 | -8.18 |
| Additive share of dry matter | 0.6% | 0.163 | +0.09 |
| Undeclared quantities | 29.5% | -0.106 | -3.11 |
| Low meat (under 10% of dry matter) | yes | -3.158 | -3.16 |
| Additive penalty | -0.60 | 0.222 | -0.13 |
| Processing multiplier | 1.00 | 33.786 | +33.79 |
| Processing: Wet Chunks | yes | -0.672 | -0.67 |
Show all 40 components
| Component | Input | Coefficient | Contribution |
|---|---|---|---|
| Base score | - | 30.909 | +30.91 |
| Average ingredient quality | 1.0 | 9.191 | +9.16 |
| Meat share of dry matter | 0.0% | 0.096 | +0.00 |
| Carb share of dry matter | 0.0% | -0.115 | +0.00 |
| Oil share of dry matter | 88.8% | -0.092 | -8.18 |
| Vegetable share of dry matter | 0.0% | -0.005 | +0.00 |
| Additive share of dry matter | 0.6% | 0.163 | +0.09 |
| Supplement share of dry matter | 0.0% | -0.012 | +0.00 |
| Other share of dry matter | 0.0% | -0.375 | +0.00 |
| Unrecognised share of dry matter | 0.0% | -0.027 | +0.00 |
| Recipe graded poor | 0.0% | -0.065 | +0.00 |
| Poor-quality meat in recipe | 0.0% | -0.179 | +0.00 |
| Number of poor ingredients | 0 | -0.876 | +0.00 |
| Largest single poor ingredient | 0.0% | 0.060 | +0.00 |
| Undeclared quantities | 29.5% | -0.106 | -3.11 |
| Prints ingredient percentages | no | 0.000 | +0.00 |
| Complete diet | no | 2.294 | +0.00 |
| Frozen or chilled fresh | no | 0.000 | +0.00 |
| High meat (30%+ of dry matter) | no | 0.707 | +0.00 |
| Low meat (under 10% of dry matter) | yes | -3.158 | -3.16 |
| High carb and low meat | no | -1.180 | +0.00 |
| Meat share × printed percentages | 0.0 | 0.000 | +0.00 |
| Meat share × fresh | 0.0 | 0.000 | +0.00 |
| Fresh × high meat | 0.0 | 11.084 | +0.00 |
| Additive penalty | -0.60 | 0.222 | -0.13 |
| Processing multiplier | 1.00 | 33.786 | +33.79 |
| Processing: Raw | no | -0.054 | +0.00 |
| Processing: Fresh Chilled | no | -2.354 | +0.00 |
| Processing: Fresh Frozen | no | -2.354 | +0.00 |
| Processing: Fresh Refrigerated | no | 0.000 | +0.00 |
| Processing: Fresh Shelf | no | -0.672 | +0.00 |
| Processing: Dry Freeze Dried | no | 6.629 | +0.00 |
| Processing: Dry Air Dried | no | 6.331 | +0.00 |
| Processing: Dry Cold Pressed | no | -6.713 | +0.00 |
| Processing: Dry Baked | no | -6.713 | +0.00 |
| Processing: Dry Extruded | no | -6.713 | +0.00 |
| Processing: Dry Semi Moist | no | -6.174 | +0.00 |
| Processing: Dry Muesli | no | -10.146 | +0.00 |
| Processing: Wet Pate | no | -0.672 | +0.00 |
| Processing: Wet Chunks | yes | -0.672 | -0.67 |
- Processing-type offset
- -0.08
- Additives declared on label
- +1 transparency bonus
- Subtotal
- 59.6
- Final score
- 60/100
Contributions are rounded to two decimals, so they may not sum exactly to the subtotal. The full coefficient table is published on the methodology page.
This is not a complete diet, so the 1-100 rating does not apply to it. Read the recipe breakdown above as ingredient-quality context only.
Score history across model versions
The score shown above is always computed with the latest published model. Earlier scores are kept for the record and are never edited or deleted; a scoring change ships as a new model version with a public write-up on the methodology page.
Nutritional: declared analysis vs reference ranges
Not applicable to complementary food. FEDIAF reference ranges apply to complete diets.
Transparency: what the label discloses
How much the manufacturer discloses, measured against the FEDIAF Code of Good Labelling Practice and Regulation 767/2009. Mandatory items dominate the weighting.
| Item | Points |
|---|---|
| Ingredient list on the label (mandatory) | 10/10 |
| Printed percentages on the label (70.5% of the recipe mass) (voluntary) | 14.1/20 |
| Analytical constituents declared (mandatory) - not on file | 0/15 |
| Additives declared (mandatory) | 5/10 |
| Energy value declared (voluntary) - not on file | 0/5 |
| Complete/complementary designation (mandatory) | 5/5 |
| Feeding guidance given (mandatory) - not on file | 0/10 |
| Manufacturer identity and address (mandatory) | 5/10 |
| Country of manufacture stated (voluntary) | 10/10 |
| Batch and date labelling (mandatory) - not on file | 0/5 |
Capped at 60: mandatory items missing (Analytical constituents declared, Feeding guidance given, Batch and date labelling).
Safety: recall history
Recall and safety-notice history, time-decayed. This dimension is shown alongside the score and never feeds the headline number.
No recalls recorded in our database.
See all current recalls we track.
Evidence: what the brand claims, and what supports it
The claims made on the pack and product page, checked against the declared label. We record claims as stated; "consistent" means our stored label data supports the claim, "contradicted" means it conflicts with it. Functional claims are recorded but never scored.
Claims on file; none we can check against the label
| Claim | Type | Check | Substantiation |
|---|---|---|---|
| Finest Fish Oil For Dogs & Cats (on page) | Content | not checkable | Manufacturer assertion |
| Pure Killybegs Fish Oil for Dogs & Cats (on page) | Content | not checkable | Manufacturer assertion |
| Produced exclusively from Atlantic Salmon with Wild Irish Mackerel & Blue Whiting (on page) | Content | not checkable | Manufacturer assertion |
| highly palatable pure Irish fish oil (on page) | Content | not checkable | Manufacturer assertion |
| OUTSTANDING SOURCE OF OMEGA 3, 6 & 9 (on page) | Nutrient | not checkable | Manufacturer assertion |
| 100% Natural (on page) | Content | not checkable | Manufacturer assertion |
| No hidden nasties (on page) | Free-from | not checkable | Manufacturer assertion |
| Free From Artificial Colours, Flavours or Preservatives (on page) | Free-from | not checkable | Manufacturer assertion |
| aid their CARDIOVASCULAR HEALTH (on page) | Functional | not checkable | Manufacturer assertion |
| keeping their SKIN & COAT healthy & shiny (on page) | Functional | not checkable | Manufacturer assertion |
| supporting their COGNITIVE FUNCTION (on page) | Functional | not checkable | Manufacturer assertion |
| helping with their JOINTS & MOBILITY (on page) | Functional | not checkable | Manufacturer assertion |
| easily digestible (on page) | Functional | not checkable | Manufacturer assertion |
| finest Irish fish oil (on page) | Content | not checkable | Manufacturer assertion |
| contains approximately 70% salmon oil (on page) | Content | not checkable | Manufacturer assertion |
| offers a broader nutritional profile than plain salmon oil (on page) | Nutrient | not checkable | Manufacturer assertion |
| provide enhanced support for cardiovascular health (on page) | Functional | not checkable | Manufacturer assertion |
| may reduce the risk of heavy metal accumulation (on page) | Functional | not checkable | Manufacturer assertion |
| Enhanced Nutritional Profile (on page) | Nutrient | not checkable | Manufacturer assertion |
| substantially more Vitamin B12 (+578%) and Vitamin B2 (+205%) (on page) | High/low level | not checkable | Manufacturer assertion |
| provide a wider range of omega-3, 6, and 9 fatty acids (on page) | Nutrient | not checkable | Manufacturer assertion |
| support cardiovascular health, joint mobility, and cognitive function (on page) | Functional | not checkable | Manufacturer assertion |
| Lower Toxin Levels (on page) | High/low level | not checkable | Manufacturer assertion |
| less likely to accumulate high levels of environmental contaminants like mercury, lead, and PCBs (on page) | High/low level | not checkable | Manufacturer assertion |
| more sustainable practice than relying solely on salmon (on page) | Content | not checkable | Manufacturer assertion |
| highly palatable (on page) | Functional | not checkable | Manufacturer assertion |
| Irresistible Flavour (on page) | Functional | not checkable | Manufacturer assertion |
| generally easy to digest for dogs (on page) | Functional | not checkable | Manufacturer assertion |
The full scoring method is published. See the methodology for exactly how the headline score and each dimension are calculated.
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