Harley & Marley Joint Health Chews Duo Function Health Chews
Treat · complementaryClear label
Our verdict
Is Harley & Marley Joint Health Chews Duo Function Health Chews a good dog food?
This is a treat, not a complete diet, so it is not scored on our 1-100 scale. The ingredient breakdown below shows what is in it; a treat should be fed alongside, not instead of, a complete diet.
Complementary extruded dry treats for dogs of all life stages, with potato flour, glycerine and tapioca starch as the main ingredients.
93% 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.
What the label tells us
- The label lists 10 ingredients.
- Names its animal sources (1 named ingredient).
- Every animal ingredient is a named source.
- Lists no artificial colours or preservatives.
- Prints quantities for 6 ingredients.
Why is this treat not scored?
Our 1 to 100 rating applies to complete diets, so treats and complementary foods are presented as what the label tells us rather than a number that would invite comparison with complete meals.
What should I look for on a treat label?
A short ingredient list, named animal sources instead of generic terms, and no artificial colours or preservatives. Printed quantities are a good transparency signal, though few treat labels provide them.
These points are derived from the published ingredient list, not a rating.
Ingredients (10)93% of the recipe is estimated
Estimated composition
- carb 49.8%
- other 24.9%
- fibre 17.8%
- meat 4.0%
- veg 1.5%
- oil 1.0%
- supplement 1.0%
| # | As declared | Matched | Label reading | Declared % | Est. % |
|---|---|---|---|---|---|
| 1 | Potato Flour | Potato Flour | carb · medium | - | 28.5 |
| 2 | Veg Glycerine | Glycerine | other · medium | - | 24.9 |
| 3 | Tapioca Starch | Tapioca Starch | carb · medium | - | 21.3 |
| 4 | White Fish (4%) | White Fish | meat · good | 4 | 4.0 |
| 5 | Cellulose Fibre | Cellulose Fibre | fibre · medium | - | 17.8 |
| 6 | Salmon Oil (1%) | Salmon Oil | oil · good | 1 | 1.0 |
| 7 | Dried Mint (1%) | Mint | veg · good | 1 | 1.0 |
| 8 | Glucosamine (0.5%) | Glucosamine | supplement · good | 0.5 | 0.5 |
| 9 | Green-Lipped Mussel (0.5%) | Green-Lipped Mussel | supplement · good | 0.5 | 0.5 |
| 10 | Spirulina (0.5%) | Spirulina | veg · good | 0.5 | 0.5 |
- 1. Potato Flour28.5% estimated
- 2. Veg Glycerine24.9% estimated
- 3. Tapioca Starch21.3% estimated
- 4. White Fish (4%)4% declared4.0% estimated
- 5. Cellulose Fibre17.8% estimated
- 6. Salmon Oil (1%)1% declared1.0% estimated
- 7. Dried Mint (1%)1% declared1.0% estimated
- 8. Glucosamine (0.5%)0.5% declared0.5% estimated
- 9. Green-Lipped Mussel (0.5%)0.5% declared0.5% estimated
- 10. Spirulina (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 | 0.5 | 9.191 | +4.89 |
| Meat share of dry matter | 1.8% | 0.096 | +0.17 |
| Carb share of dry matter | 48.5% | -0.115 | -5.58 |
| Oil share of dry matter | 1.6% | -0.092 | -0.14 |
| Vegetable share of dry matter | 2.1% | -0.005 | -0.01 |
| Supplement share of dry matter | 1.4% | -0.012 | -0.02 |
| Other share of dry matter | 19.5% | -0.375 | -7.31 |
| Undeclared quantities | 92.5% | -0.106 | -9.77 |
| Low meat (under 10% of dry matter) | yes | -3.158 | -3.16 |
| High carb and low meat | yes | -1.180 | -1.18 |
| Processing multiplier | 0.98 | 33.786 | +33.11 |
| Processing: Dry Extruded | yes | -6.713 | -6.71 |
Show all 40 components
| Component | Input | Coefficient | Contribution |
|---|---|---|---|
| Base score | - | 30.909 | +30.91 |
| Average ingredient quality | 0.5 | 9.191 | +4.89 |
| Meat share of dry matter | 1.8% | 0.096 | +0.17 |
| Carb share of dry matter | 48.5% | -0.115 | -5.58 |
| Oil share of dry matter | 1.6% | -0.092 | -0.14 |
| Vegetable share of dry matter | 2.1% | -0.005 | -0.01 |
| Additive share of dry matter | 0.0% | 0.163 | +0.00 |
| Supplement share of dry matter | 1.4% | -0.012 | -0.02 |
| Other share of dry matter | 19.5% | -0.375 | -7.31 |
| 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 | 92.5% | -0.106 | -9.77 |
| 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 | yes | -1.180 | -1.18 |
| 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 | 0.00 | 0.222 | +0.00 |
| Processing multiplier | 0.98 | 33.786 | +33.11 |
| 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 | yes | -6.713 | -6.71 |
| 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 | no | -0.672 | +0.00 |
- Processing-type offset
- +0.02
- Subtotal
- 35.2
- Final score
- 35/100
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 (7.5% of the recipe mass) (voluntary) | 1.5/20 |
| Analytical constituents declared (mandatory) - not on file | 0/15 |
| Additives declared (mandatory) - not on file | 0/10 |
| 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, Additives 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.
100/100 · moderate — 1 checkable claim: 1 consistent, 0 contradicted.
Consistent with the label
- "Grain-Free" — supported by the declared grain-free data.
10 further claims on file that we cannot check against the label.
Moderate: every checkable claim is consistent with the declared label.
| Claim | Type | Check | Substantiation |
|---|---|---|---|
| White Fish is particularly low in saturated fat and easy to digest – a great option for dogs with sensitive tummies or allergies. (on page) | Functional | not checkable | Manufacturer assertion |
| Green-Lipped Mussel is packed with Omega-3 Fatty Acids and other nutrients that support Joint Health and Mobility. (on page) | Functional | not checkable | Manufacturer assertion |
| Glucosamine not only supports joint health but also provides comfort to dogs, helping them move more freely and comfortably. (on page) | Functional | not checkable | Manufacturer assertion |
| Spirulina is rich in nutrients like vitamins, minerals, and antioxidants, which promote overall health in dogs. (on page) | Functional | not checkable | Manufacturer assertion |
| support Healthy Teeth and Gums, as well as Fresh Breath (on page) | Functional | not checkable | Manufacturer assertion |
| Human Grade (on page) | Content | not checkable | Manufacturer assertion |
| 100% Natural Health Chews (on page) | Content | not checkable | Manufacturer assertion |
| No Added Sugar or Artificial Flavours or Colourings (on page) | Free-from | not checkable | Manufacturer assertion |
| Low Calorie (on page) | High/low level | not checkable | Manufacturer assertion |
| Grain-Free (on page) | Free-from | consistent | Manufacturer assertion |
| White Fish & Green-Lipped Mussel with Glucosamine & Spirulina (on page) | Content | 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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