Harley & Marley Finest Fish Oil

Supplement complementary Clear label

This is a supplement, not a complete diet. The 1–100 rating applies to complete foods, so it isn't scored. Ingredient breakdown below.

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.

How we score

30% of this recipe has no printed percentage. Estimated shares are model estimates, not label facts.

Recipe
Not applicable
Nutritional
Not applicable
Transparency
49
Safety
100
Evidencelimited
33

Complementary supplement for dogs of all life stages, with salmon oil, mackerel and whiting as the main ingredients.

Why you might choose it

Prints ingredient percentages on the label.
Single named animal protein: fish.
Doesn't list grain ingredients.

Why you might not

A supplement, not a complete diet: feed as an extra, not the whole diet.
No analytical breakdown is published.

View the source page

Estimated composition

oil70.0%

meat29.5%

additive0.5%

Typical analysis (as fed)

No analysis recorded yet.

Additives & feeding info

Technological additives

Antioxidants 0.5%

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. Use the homepage filter to find foods that fit your dog.

Ingredients (4)

#	As declared	Matched	Category	Tier	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	poor	0.5	0.5

Brand

Website: https://www.harleyandmarley.co.uk/
Social: Instagram

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.

Recipe: how the 1-100 score is calculated

Scored with model v2 on 2026-09-22. Each component is the feature value for this product multiplied by the model's published coefficient.

Component	Input	Coefficient	Contribution
Base score	-	32.336	+32.34
Average ingredient quality	1.0	9.915	+9.87
Meat share of dry matter	10.6%	0.116	+1.23
Oil share of dry matter	88.8%	-0.088	-7.84
Additive share of dry matter	0.6%	0.177	+0.10
Recipe graded poor	0.5%	-0.045	-0.02
Number of poor ingredients	1	-0.868	-0.87
Largest single poor ingredient	0.5%	0.056	+0.03
Undeclared quantities	29.5%	-0.131	-3.86
Prints ingredient percentages	yes	3.194	+3.19
Meat share × printed percentages	10.6	-0.073	-0.78
Additive penalty	-0.60	0.236	-0.14
Processing multiplier	1.00	32.336	+32.34
Processing: Wet Chunks	yes	2.292	+2.29

Show all 40 components

Component	Input	Coefficient	Contribution
Base score	-	32.336	+32.34
Average ingredient quality	1.0	9.915	+9.87
Meat share of dry matter	10.6%	0.116	+1.23
Carb share of dry matter	0.0%	-0.113	+0.00
Oil share of dry matter	88.8%	-0.088	-7.84
Vegetable share of dry matter	0.0%	-0.002	+0.00
Additive share of dry matter	0.6%	0.177	+0.10
Supplement share of dry matter	0.0%	-0.009	+0.00
Other share of dry matter	0.0%	-0.371	+0.00
Unrecognised share of dry matter	0.0%	-0.022	+0.00
Recipe graded poor	0.5%	-0.045	-0.02
Poor-quality meat in recipe	0.0%	-0.182	+0.00
Number of poor ingredients	1	-0.868	-0.87
Largest single poor ingredient	0.5%	0.056	+0.03
Undeclared quantities	29.5%	-0.131	-3.86
Prints ingredient percentages	yes	3.194	+3.19
Complete diet	no	1.703	+0.00
Frozen or chilled fresh	no	11.440	+0.00
High meat (30%+ of dry matter)	no	-0.506	+0.00
Low meat (under 10% of dry matter)	no	-1.988	+0.00
High carb and low meat	no	-1.250	+0.00
Meat share × printed percentages	10.6	-0.073	-0.78
Meat share × fresh	0.0	-0.339	+0.00
Fresh × high meat	0.0	16.475	+0.00
Additive penalty	-0.60	0.236	-0.14
Processing multiplier	1.00	32.336	+32.34
Processing: Raw	no	13.322	+0.00
Processing: Fresh Chilled	no	7.712	+0.00
Processing: Fresh Frozen	no	6.583	+0.00
Processing: Fresh Refrigerated	no	4.857	+0.00
Processing: Fresh Shelf	no	0.072	+0.00
Processing: Dry Freeze Dried	no	11.127	+0.00
Processing: Dry Air Dried	no	9.320	+0.00
Processing: Dry Cold Pressed	no	4.569	+0.00
Processing: Dry Baked	no	-2.321	+0.00
Processing: Dry Extruded	no	-6.996	+0.00
Processing: Dry Semi Moist	no	-6.833	+0.00
Processing: Dry Muesli	no	-10.711	+0.00
Processing: Wet Pate	no	2.935	+0.00
Processing: Wet Chunks	yes	2.292	+2.29

Processing-type offset: +0.01
Additives declared on label: +1 transparency bonus
Subtotal: 68.9
Final score: 69/100

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.

Model	Score
v2	69/100	current
v1	60/100
v1.9	59/100

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 marketing claims made on the pack and product page, and how much evidence sits behind them. We record the claims as stated; we do not assess whether they are true.

Claim	Type	Substantiation
aid their CARDIOVASCULAR HEALTH (on page)	Functional	Manufacturer assertion
keeping their SKIN & COAT healthy & shiny (on page)	Functional	Manufacturer assertion
supporting their COGNITIVE FUNCTION (on page)	Functional	Manufacturer assertion
helping with their JOINTS & MOBILITY (on page)	Functional	Manufacturer assertion
easily digestible (on page)	Functional	Manufacturer assertion
100% Natural (on page)	Content	Manufacturer assertion
Produced exclusively from Atlantic Salmon with Wild Irish Mackerel & Blue Whiting. (on page)	Content	Manufacturer assertion
Free From Artificial Colours, Flavours or Preservatives (on page)	Free-from	Manufacturer assertion
OUTSTANDING SOURCE OF OMEGA 3, 6 & 9 (on page)	Nutrient	Manufacturer assertion
No hidden nasties (on page)	Free-from	Manufacturer assertion