HILL'S · REVIEW
Hill's Prescription Diet Z/d
Hill's Prescription Diet Z/d scores 2.1/5 for ingredient quality — a dry food cat food with 32.1% protein targeting adult cats.
Below Average
MiauMiau AI score · 2.1/5
AI ANALYSIS
What MiauMiau's AI actually sees
This food is a veterinary diet built on low-spec, unnamed ingredients. The first two ingredients are 'cereals' and 'meat and animal by-products', which drive the low ingredient quality score. With no moisture % provided, we cannot calculate dry matter protein or carbs precisely, so scores are capped based on incomplete data; the high cereal content points to a carbohydrate-heavy formula unsuitable for obligate carnivores.
According to MiauMiau's analysis of over 5,000+ dry food products, Hill's Prescription Diet Z/d scores below the dry food average.
Analyzed by MiauMiau's Nutritional AI · June 2026
This analysis is generated from ingredient and compositional data. It is not veterinary advice. Always consult your veterinarian for health decisions.
Score breakdown
HOW IT COMPARES
Hill's Prescription Diet Z/d vs. the category
Compared to the average dry food across 5,000+ products in our database.
Category avg: 2.7/5
Scores 0.6 points below the average dry food
OUR ASSESSMENT
What we like vs. what to watch
What we like
- Grain-free formula
- Nutritionally complete — suitable as a sole diet
What to watch
- Ingredient quality is below average
- Protein content falls short of optimal levels
- Contains notable filler ingredients
- Uses vague 'derivatives' instead of named ingredients
WHO IT'S FOR
Is this right for your cat?
Best for
INGREDIENTS
What's actually in the bag
Top ingredients
- 01cereals
- 02meat and animal by-products
- 03oils and fats
- 04vegetable protein extracts
- 05eggs and egg products
Ingredients are listed by weight. The first ingredients make up the majority of the formula.
Concerns
- Uses unnamed animal derivatives instead of specific protein sources
NUTRITION
The numbers
Guaranteed analysis
FULL LABEL
Every ingredient
cereals, meat and animal by-products, oils and fats, vegetable protein extracts, eggs and egg products, minerals, urine acidifying substances: DL-methionine, calcium sulphate, potassium chloride, choline chloride.
FAQ
Questions worth answering
Is Hill's Prescription Diet Z/d good for cats?
According to MiauMiau's AI analysis, Hill's Prescription Diet Z/d is a below-average dry food with a quality score of 2.1 out of 5. This food is a veterinary diet built on low-spec, unnamed ingredients. The first two ingredients are 'cereals' and 'meat and animal by-products', which drive the low ingredient quality score. With no moisture % provided, we cannot calculate dry matter protein or carbs precisely, so scores are capped based on incomplete data; the high cereal content points to a carbohydrate-heavy formula unsuitable for obligate carnivores.
What is the protein content of Hill's Prescription Diet Z/d?
Hill's Prescription Diet Z/d contains 32.1% protein as listed on the label.
Is Hill's Prescription Diet Z/d grain-free?
Yes, Hill's Prescription Diet Z/d is grain-free. It does not contain wheat, corn, rice, or other grain ingredients. This can be beneficial for cats with grain sensitivities, though most healthy cats tolerate grains without issues.
How does Hill's Prescription Diet Z/d compare to other dry food?
According to MiauMiau's database of over 5,000+ cat food products, Hill's Prescription Diet Z/d scores 0.6 points below the average dry food quality score of 2.7. MiauMiau's AI evaluates ingredient quality, protein adequacy, filler content, and additive safety to generate each score.
Is Hill's Prescription Diet Z/d suitable for kittens or senior cats?
Hill's Prescription Diet Z/d is formulated for adult cats. If you have a kitten or a senior cat, look for formulas specifically designed for their life stage.
What are the main ingredients in Hill's Prescription Diet Z/d?
The top 5 ingredients in Hill's Prescription Diet Z/d are: cereals, meat and animal by-products, oils and fats, vegetable protein extracts, eggs and egg products. The primary ingredient is cereals. The remaining top ingredients are meat and animal by-products, oils and fats, vegetable protein extracts, eggs and egg products. Ingredient order indicates proportion by weight, so the first ingredients make up the bulk of the formula.
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