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 z/d Food Sensitivities Dry Dog Food Original
Dry Extruded complete veterinary diet Clear label
Is Hill's z/d Food Sensitivities Dry Dog Food Original a good dog food?
We score it 40/100 (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".
Why this score?
This recipe achieves an overall score of 40 out of 100. Printing percentages on the label helped the score by +3.2. However, ingredients without printed percentages reduced the score by -9.7, the processing format subtracted -7, and the remaining ingredients lowered it by -2.8. 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.
74% of this recipe has no printed percentage. Estimated shares are model estimates, not label facts.
- Recipe40
- Nutritionalhigh88
- Transparency60
- Safety100
- Evidencelimited33
The Recipe score measures how attractive and transparent the declared ingredient list is. It is not, by itself, proof that the food is nutritionally appropriate for long-term feeding. The Nutritional and Evidence scores measure what we can verify towards that stronger claim.
Complete extruded dry food for adult dogs, with vegetable by, meat and animal derivatives and oils and fats as the main ingredients.
Why you might choose it
- Prints ingredient percentages on the label.
- Declares energy content, which most labels omit.
- Nutritionally complete: formulated to be fed as the whole diet.
Why you might not
- 6 poor-graded ingredients make up about 53% of the recipe.
- Low in protein: 19% protein on a dry-matter basis.
Estimated composition
Typical analysis (as fed)
- Protein
- 17.80%
- Fat
- 13.70%
- Fibre
- 6.10%
- Ash
- 5.10%
- Moisture
- 8%
- Carbohydrates
- 48.70%
- Calcium
- 0.72%
- Phosphorus
- 0.49%
- Sodium
- 0.24%
Energy: 351 kcal/100g
Additives & feeding info
Nutritional additives
3b103 (Iron) 94.8mg/kg; 3b202 (Iodine) 4.2mg/kg; 3b405 (Copper) 11.1mg/kg; 3b502 (Manganese) 9.8mg/kg; 3b603 (Zinc) 147mg/kg; Vitamin A 18,594 IU/kg; Vitamin D3 735 IU/kg; Vitamin E 832mg/kg; Vitamin C 116mg/kg; Beta-carotene 1.4mg/kg
Technological additives
natural antioxidant
Feeding guide
Feed only this food. It is recommended that a veterinarian's opinion be sought before use / extending the period of use. Recommended time of use: 3 to 8 weeks; if signs of intolerance disappear, this feed can be used initially up to one year. Fresh water should be available at all times. Adult maintenance: 2 kg = 55g, 5 kg = 105g, 10 kg = 180g, 20 kg = 300g, 30 kg = 410g, 40 kg = 505g, 50+ kg = 11g per kg.
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: it is listed as an ingredient
- Your dog avoids fish: the label lists fish oil
- Your dog avoids grain: the label lists maize / corn
- You want a single-protein recipe: this one lists more than one animal protein
- You need more protein than this: 19.3% 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. Use the homepage filter to find foods that fit your dog.
Ingredients (15)
| # | As declared | Matched | Category | Tier | Declared % | Est. % |
|---|---|---|---|---|---|---|
| 1 | Derivatives of vegetable origin | Vegetable By-Products | other | poor | - | 24.4 |
| 2 | meat and animal derivatives | Meat and Animal Derivatives | meat | poor | - | 20.4 |
| 3 | oils and fats | Oils and Fats | oil | poor | - | 16.3 |
| 4 | fish oil 0.9% | Fish Oil | oil | good | 0.9 | 0.9 |
| 5 | 6.25% minerals | Vitamins and minerals | supplement | medium | 6.25 | 6.3 |
| 6 | 6.25% fruit | Fruit | veg | medium | 6.25 | 6.3 |
| 7 | 6.25% seeds | Seeds | veg | poor | 6.25 | 6.3 |
| 8 | 6.25% Chicken liver hydrolysate | Liver | meat | good | 6.25 | 6.3 |
| 9 | 1.86% Maize starch | Maize / Corn | carb | poor | 1.86 | 1.9 |
| 10 | 1.86% Ground pecan shell | Ground Pecan Shell | fibre | poor | 1.86 | 1.9 |
| 11 | 1.86% flaxseed | Linseed | veg | good | 1.86 | 1.9 |
| 12 | 1.86% dried beet pulp | Beet Pulp | fibre | medium | 1.86 | 1.9 |
| 13 | 1.86% dried citrus pulp | Citrus Pulp | fibre | medium | 1.86 | 1.9 |
| 14 | 1.86% dried cranberries | Cranberries | veg | good | 1.86 | 1.9 |
| 15 | 1.86% ActivBiome+ prebiotic blend | Prebiotics | supplement | good | 1.86 | 1.9 |
Brand
- 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 v2 (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.
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 | -0.1 | 9.915 | -0.60 |
| Meat share of dry matter | 12.0% | 0.116 | +1.39 |
| Carb share of dry matter | 10.9% | -0.113 | -1.23 |
| Oil share of dry matter | 14.3% | -0.088 | -1.27 |
| Vegetable share of dry matter | 19.7% | -0.002 | -0.03 |
| Supplement share of dry matter | 8.1% | -0.009 | -0.07 |
| Other share of dry matter | 7.4% | -0.371 | -2.76 |
| Recipe graded poor | 53.3% | -0.045 | -2.38 |
| Poor-quality meat in recipe | 10.0% | -0.182 | -1.82 |
| Number of poor ingredients | 6 | -0.868 | -5.21 |
| Largest single poor ingredient | 10.6% | 0.056 | +0.60 |
| Undeclared quantities | 74.1% | -0.131 | -9.70 |
| Prints ingredient percentages | yes | 3.194 | +3.19 |
| Complete diet | yes | 1.703 | +1.70 |
| Meat share × printed percentages | 12.0 | -0.073 | -0.88 |
| Additive penalty | -0.80 | 0.236 | -0.19 |
| Processing multiplier | 1.00 | 32.336 | +32.34 |
| Processing: Dry Extruded | yes | -6.996 | -7.00 |
Show all 40 components
| Component | Input | Coefficient | Contribution |
|---|---|---|---|
| Base score | - | 32.336 | +32.34 |
| Average ingredient quality | -0.1 | 9.915 | -0.60 |
| Meat share of dry matter | 12.0% | 0.116 | +1.39 |
| Carb share of dry matter | 10.9% | -0.113 | -1.23 |
| Oil share of dry matter | 14.3% | -0.088 | -1.27 |
| Vegetable share of dry matter | 19.7% | -0.002 | -0.03 |
| Additive share of dry matter | 0.0% | 0.177 | +0.00 |
| Supplement share of dry matter | 8.1% | -0.009 | -0.07 |
| Other share of dry matter | 7.4% | -0.371 | -2.76 |
| Unrecognised share of dry matter | 0.0% | -0.022 | +0.00 |
| Recipe graded poor | 53.3% | -0.045 | -2.38 |
| Poor-quality meat in recipe | 10.0% | -0.182 | -1.82 |
| Number of poor ingredients | 6 | -0.868 | -5.21 |
| Largest single poor ingredient | 10.6% | 0.056 | +0.60 |
| Undeclared quantities | 74.1% | -0.131 | -9.70 |
| Prints ingredient percentages | yes | 3.194 | +3.19 |
| Complete diet | yes | 1.703 | +1.70 |
| 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 | 12.0 | -0.073 | -0.88 |
| Meat share × fresh | 0.0 | -0.339 | +0.00 |
| Fresh × high meat | 0.0 | 16.475 | +0.00 |
| Additive penalty | -0.80 | 0.236 | -0.19 |
| 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 | yes | -6.996 | -7.00 |
| 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 | no | 2.292 | +0.00 |
- Processing-type offset
- -0.01
- Additives declared on label
- +2 transparency bonus
- Subtotal
- 40.4
- Final score
- 40/100
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.
| Model | Score | |
|---|---|---|
| v2 | 40/100 | current |
| v1 | 42/100 | |
| v1.9 | 43/100 |
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 | 17.8 | 19.3 (band 18 to 40%) | 73.7 |
| Fat | 13.7 | 14.9 (band 5.5 to 20%) | 100 |
| Fibre | 6.1 | 6.6 (band 0.5 to 5%) | 100 |
| Calcium | 0.72 | 0.8 (band 0.5 to 2.5%) | 78.5 |
| Phosphorus | 0.49 | 0.5 (band 0.4 to 1.6%) | 76.6 |
| Calcium:phosphorus ratio | 1.5 | 1.5 (band 1 to 2%) | 98.2 |
| Energy (kcal/100g) | 351 | 381.5 | 100 |
Scored over 7 declared nutrients (combined weight 90); undeclared nutrients do not affect the score.
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 (25.9% of the recipe mass) (voluntary) | 5.2/20 |
| 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 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 |
|---|---|---|
| clinically proven nutrition to reduce skin & digestive signs from food intolerances (on page) | Functional | Manufacturer assertion |
| ActivBiome+ ingredient technology is a proprietary blend of prebiotics shown to rapidly activate the gut microbiome to support digestive health and well-being (on page) | Functional | Manufacturer assertion |
| Formulated to promote a urinary environment that reduces the risk of developing struvite & calcium oxalate crystals (on page) | Functional | Manufacturer assertion |
| With highly hydrolysed animal protein (on page) | Content | Manufacturer assertion |
| With fish oil, increased levels of essential fatty acids & high levels of vitamin E (on page) | Content | Manufacturer assertion |
| 100% Satisfaction Guarantee for quality, consistency & taste, or your money back (on page) | Content | Manufacturer assertion |
| With a proven blend of prebiotic fibres (on page) | Content | Manufacturer assertion |
| complete dietetic pet food for reduction of ingredient and nutrient intolerances in adult dogs (on pack) | Content | Manufacturer assertion |
Limited: at least one claim rests on manufacturer assertion alone.
The full scoring method is published. See the methodology for exactly how the headline score and each dimension are calculated.
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