Hill’s Science Diet vs Purina Pro Plan Cat Food (2026)
Quick Verdict
| Category | Hill’s Science Diet | Purina Pro Plan |
|---|---|---|
| Overall Score | 8.6/10 | 8.8/10 |
| Ingredient Quality | High | High |
| Price | ~$25–$55/7 lb | ~$18–$32/7 lb |
| AAFCO Compliant | Yes | Yes |
| Best For | Vet-standard balanced nutrition, weight management, Prescription Diet | High protein, probiotics, performance |
Overview
Hill’s Science Diet cat food and Purina Pro Plan are the two most vet-recommended cat food brands. Both have prescription diet lines, but Pro Plan leads on protein content while Science Diet leads on weight management and Prescription Diet breadth.
Ingredient Comparison
Hill’s Science Diet: Chicken or turkey as first ingredient. Corn gluten meal secondary. Balanced micronutrients. No artificial flavors or preservatives.
Purina Pro Plan: Chicken first. Live Lactobacillus probiotics. Corn gluten meal secondary.
Nutritional Snapshot
| Nutrient | Hill’s Science Diet | Purina Pro Plan |
|---|---|---|
| Crude Protein (min) | 30% | 40% |
| Crude Fat (min) | 16% | 17% |
Pros and Cons
Hill’s Science Diet
Pros
- Excellent Prescription Diet line (c/d urinary, k/d kidney, m/d diabetes)
- Weight management formulas
- Vet-office standard
- No artificial preservatives
Cons
- Lower protein (30%) than Pro Plan
- More expensive in some lines
- Contains corn
Purina Pro Plan
Pros
- 40% protein—superior for obligate carnivores
- Live probiotics
- Pro Plan Vet Diets
- More affordable per pound
Cons
- Contains corn derivatives
- Less comprehensive weight management line than Science Diet
Best For
Choose Hill’s Science Diet if: Your vet recommends Science Diet, you need a Prescription Diet (c/d, k/d, m/d), or weight management is a priority.
Choose Purina Pro Plan if: Maximum protein for feline obligate carnivore needs with live probiotic support.
Alternatives
- [Royal Canin vs Hills Science Diet Cat](/compare/royal-canin-vs-hills-science-diet-cat)
- [Wellness vs Purina Pro Plan Cat](/compare/wellness-vs-purina-pro-plan-cat)
FAQ
Does Hill’s Science Diet have a prescription line for cats?
Yes—Hill’s Prescription Diet c/d (urinary), k/d (kidney), m/d (diabetes), z/d (allergies), and more. These require vet prescription.
Which has higher protein?
Pro Plan at 40% significantly leads Science Diet at 30%. This matters greatly for cats as obligate carnivores.
Is Hill’s Science Diet good for indoor cats?
Yes. Science Diet Indoor has appropriate calorie levels and fiber content for indoor cats.
Has Science Diet cat food been recalled?
Science Diet wet cat food was included in Hill’s 2019 vitamin D recall. The dry cat food line was not affected.
Which is better for a cat with urinary issues?
Hill’s c/d Urinary Care is the gold standard for feline urinary health management. Pro Plan also has a urinary formula (UR), but Hill’s is more widely prescribed.
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