veterinary diet
This is a medical nutrition decision. Speak to your vet.
This is a veterinary diet product: a "dietetic" feed designed for a particular nutritional purpose and intended for use under veterinary direction. The score and figures below are readings of the label, the same as for any other food: they can't tell you whether this product is right for your dog.
Hill's Prescription Diet j/d Dog Food
Dry Extruded · completeveterinary diet
Our verdict
Is Hill's Prescription Diet j/d Dog Food a good dog food?
We score it 22/100 (Poor). The main reasons are set out in "Why you might not" below, and every step of the calculation is shown under "How we calculated this score".
Complete extruded dry food for adult dogs, with cereals, meat and animal derivatives and chicken as the main ingredients.
96% 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 adult dogs
- Doesn't list beef, turkey, lamb, venison, pork, duck as ingredients
Consider something else if:
- Your dog avoids chicken: the label lists chicken
- Your dog avoids fish: the label lists crustaceans
- Your dog avoids grain: the label lists cereals
- You want a single-protein recipe: this one lists more than one animal protein
- You need more protein than this: 19.8% on a dry-matter basis is in the low band
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 feedingProtein 18.20% · Fat 15.20%
Typical analysis (as fed)
| Nutrient | As fed |
|---|---|
| Protein | 18.20% |
| Fat | 15.20% |
| Fibre | 5.70% |
| Ash | 4.80% |
| Moisture | 8% |
| Carbohydrates | 48.20% |
| Omega-3 fatty acids | 3.25% |
| Omega-6 fatty acids | 2.25% |
| Calcium | 0.73% |
| Phosphorus | 0.56% |
| Sodium | 0.23% |
Energy: 362 kcal/100g
Additives & feeding info
Feeding and storage
Storage
Cover and refrigerate unused portion
Feeding guide
Feed only this food. Feed the correct daily amount shown according to dog's size. Adjust amount to maintain optimum weight; may be divided into 2+ meals/day. Recommended: support of joint metabolism in osteoarthritis - initially up to 3 months; support of heart function in chronic cardiac insufficiency - initially up to 6 months. Fresh water should be available at all times.
Additives declared on the label
Nutritional additives
3b103 (Iron) 88.4mg; 3b202 (Iodine) 2.2mg; 3b405 (Copper) 8.7mg; 3b502 (Manganese) 9.1mg; 3b603 (Zinc) 155mg; 3b801 (Selenium) 0.2mg; with natural antioxidant
Technological additives
natural antioxidant
Ingredients (10)96% of the recipe is estimated
Estimated composition
- meat 33.0%
- carb 23.6%
- veg 12.2%
- oil 11.4%
- other 10.7%
- supplement 9.1%
| # | As declared | Matched | Label reading | Declared % | Est. % |
|---|---|---|---|---|---|
| 1 | Cereals | Cereals | carb · poor | - | 13.7 |
| 2 | meat and animal derivatives | Meat and Animal Derivatives | meat · poor | - | 13.0 |
| 3 | chicken 4% | Chicken | meat · medium | 4 | 4.0 |
| 4 | seeds | Seeds | veg · poor | - | 12.2 |
| 5 | oils and fats | Oils and Fats | oil · poor | - | 11.4 |
| 6 | derivatives of vegetable origin | Vegetable By-Products | other · poor | - | 10.7 |
| 7 | vegetable protein extracts | Vegetable protein extracts | carb · poor | - | 9.9 |
| 8 | minerals | Vitamins and minerals | supplement · medium | - | 9.1 |
| 9 | eggs and egg derivatives | Egg | meat · good | - | 8.4 |
| 10 | molluscs and crustaceans | Crustaceans | meat · good | - | 7.6 |
- 1. Cereals13.7% estimated
- 2. meat and animal derivatives13.0% estimated
- 3. chicken 4%4% declared4.0% estimated
- 4. seeds12.2% estimated
- 5. oils and fats11.4% estimated
- 6. derivatives of vegetable origin10.7% estimated
- 7. vegetable protein extracts9.9% estimated
- 8. minerals9.1% estimated
- 9. eggs and egg derivatives8.4% estimated
- 10. molluscs and crustaceans7.6% estimated
Trust and sourceNo recalls recorded in our database · checked 2026-09-15
Brand and contact: Hill's
- Website
- https://www.hillspet.co.uk/
- Address
- Hill’s Pet Nutrition, Inc. Goldsworth Place 1 Forge End Woking GU21 6DB
- Contact page
- www.hillspet.co.uk
Trust and provenance
- Recall history
- No recalls recorded in our database
- Label data last checked
- 2026-09-15
- Scored with
- Model v3 (methodology)
- Product page
- www.hillspet.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
Why this score?
The overall score for this product is 22 out of 100. Undeclared ingredient shares contributed -10.1 points, as the recipe lists several ingredients without printed percentages, making it harder to judge their true weight in the formula. The processing format contributed -6.7 points, and the overall quality of the ingredient list contributed -5.1 points. Lower-quality ingredients contributed -4.6 points, pulling the rating down further. This is a general explanation of how the score works, not veterinary advice. For any health condition, food choice is a decision for your vet.
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 | -0.6 | 9.191 | -5.14 |
| Meat share of dry matter | 2.0% | 0.096 | +0.19 |
| Carb share of dry matter | 36.5% | -0.115 | -4.20 |
| Oil share of dry matter | 19.9% | -0.092 | -1.83 |
| Vegetable share of dry matter | 3.2% | -0.005 | -0.02 |
| Supplement share of dry matter | 14.8% | -0.012 | -0.18 |
| Other share of dry matter | 9.4% | -0.375 | -3.51 |
| Recipe graded poor | 70.9% | -0.065 | -4.60 |
| Poor-quality meat in recipe | 13.0% | -0.179 | -2.31 |
| Number of poor ingredients | 6 | -0.876 | -5.26 |
| Largest single poor ingredient | 13.7% | 0.060 | +0.82 |
| Undeclared quantities | 96.0% | -0.106 | -10.14 |
| Complete diet | yes | 2.294 | +2.29 |
| Low meat (under 10% of dry matter) | yes | -3.158 | -3.16 |
| Additive penalty | -1.63 | 0.222 | -0.36 |
| 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 | -0.6 | 9.191 | -5.14 |
| Meat share of dry matter | 2.0% | 0.096 | +0.19 |
| Carb share of dry matter | 36.5% | -0.115 | -4.20 |
| Oil share of dry matter | 19.9% | -0.092 | -1.83 |
| Vegetable share of dry matter | 3.2% | -0.005 | -0.02 |
| Additive share of dry matter | 0.0% | 0.163 | +0.00 |
| Supplement share of dry matter | 14.8% | -0.012 | -0.18 |
| Other share of dry matter | 9.4% | -0.375 | -3.51 |
| Unrecognised share of dry matter | 0.0% | -0.027 | +0.00 |
| Recipe graded poor | 70.9% | -0.065 | -4.60 |
| Poor-quality meat in recipe | 13.0% | -0.179 | -2.31 |
| Number of poor ingredients | 6 | -0.876 | -5.26 |
| Largest single poor ingredient | 13.7% | 0.060 | +0.82 |
| Undeclared quantities | 96.0% | -0.106 | -10.14 |
| Prints ingredient percentages | no | 0.000 | +0.00 |
| Complete diet | yes | 2.294 | +2.29 |
| 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 | -1.63 | 0.222 | -0.36 |
| 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
- Additives declared on label
- +2 transparency bonus
- Subtotal
- 21.9
- Final score
- 22/100
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.
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
How the declared analysis compares with FEDIAF reference ranges for adult dogs. The label prints as-fed values; we convert to a dry-matter basis before scoring, and the bands are dry-matter ranges. Scores rise to 100 at the band midpoint: the reference is adequacy, not maximisation. Nutrients with a published upper limit taper again above it; fat is policed through calorie density rather than a direct penalty.
| Nutrient | As fed (label) | Dry matter (scored) | Score |
|---|---|---|---|
| Protein | 18.2 | 19.8 (band 18 to 40%) | 74.9 |
| Fat | 15.2 | 16.5 (band 5.5 to 20%) | 100 |
| Fibre | 5.7 | 6.2 (band 0.5 to 5%) | 100 |
| Calcium | 0.73 | 0.8 (band 0.5 to 2.5%) | 78.8 |
| Phosphorus | 0.56 | 0.6 (band 0.4 to 1.6%) | 80.4 |
| Sodium | 0.23 | 0.3 (band 0.1+%) | 100 |
| Calcium:phosphorus ratio | 1.3 | 1.3 (band 1 to 2%) | 88.2 |
| Omega fatty acids (omega-6 and omega-3) | - | - | 100 |
| Energy (kcal/100g) | 362 | 393.5 | 100 |
Omega fatty acids (omega-6 and omega-3): scored as the mean of its declared components (omega-6 100). The FEDIAF minimum for omega-6 is linoleic acid specifically.
Scored over 9 declared nutrients (combined weight 105); undeclared nutrients do not affect the score.
Declared fortification: 7 nutritional additives on the label
- 3b103 (Iron) 88.4mg
- 3b202 (Iodine) 2.2mg
- 3b405 (Copper) 8.7mg
- 3b502 (Manganese) 9.1mg
- 3b603 (Zinc) 155mg
- 3b801 (Selenium) 0.2mg
- with natural antioxidant
High confidence: full analysis plus minerals or omegas and declared energy.
This measures agreement with published reference ranges, not suitability for an individual dog. For medical conditions, follow veterinary guidance.
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 (4% of the recipe mass) (voluntary) | 0.8/20 |
| Analytical constituents declared (mandatory) | 15/15 |
| Additives declared (mandatory) | 10/10 |
| Energy value declared (voluntary) | 5/5 |
| Complete/complementary designation (mandatory) | 5/5 |
| Feeding guidance given (mandatory) | 10/10 |
| Manufacturer identity and address (mandatory) | 10/10 |
| Country of manufacture stated (voluntary) | 10/10 |
| Batch and date labelling (mandatory) - not on file | 0/5 |
Capped at 60: mandatory items missing (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 |
|---|---|---|---|
| Clinically proven to support your dog's ability to run, walk and jump (on page) | Functional | not checkable | Manufacturer assertion |
| Formulated to promote a urinary environment that reduces the risk of developing struvite & calcium oxalate crystals (on pack) | Functional | not checkable | Manufacturer assertion |
| with Chicken (on pack) | Content | not checkable | Manufacturer assertion |
| Helps maintain joint cartilage (on page) | Functional | not checkable | Manufacturer assertion |
| Helps maintain lean muscle (on page) | Functional | not checkable | Manufacturer assertion |
| Supports a healthy immune system (on page) | Functional | not checkable | Manufacturer assertion |
| Added L-carnitine (on page) | Content | not checkable | Manufacturer assertion |
| Clinically proven antioxidants (on page) | Content | not checkable | Manufacturer assertion |
| Enriched with omega-3 fatty acids, glucosamine & chondroitin sulfate (on page) | Content | not checkable | Manufacturer assertion |
| Made with 100% cage-free eggs or egg derivatives (on page) | provenance | not checkable | Manufacturer assertion |
| complete dietetic pet food for support of the metabolism of joints in case of osteoarthritis and for support of heart function in case of chronic cardiac insufficiency in adult dogs (on pack) | Functional | not checkable | Manufacturer assertion |
| high level of EPA, of total omega-3 fatty acids and an adequate level of vitamin E and restricted level of sodium (on pack) | Nutrient | not checkable | Manufacturer assertion |
| complete and balanced food that provides all the nutrition your dog needs (on page) | Nutrient | 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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