TL;DR
- IAMS ProActive Health Adult (as-fed GA): Protein 32%, Fat 15%, Fiber 3%, Moisture 10% (product labels / retailer pages).
- Converted to dry-matter (DM) for apples-to-apples comparison, the key macros are:
- IAMS (DM): Protein 35.56%, Fat 16.67%, Carbs (NFE) 36.67%, Fiber 3.33%.
- Purina ONE Indoor (DM est.): Protein 42.05%, Fat 10.23%, Carbs 32.73%, Fiber 5.91%.
- Hill’s Science Diet Adult Indoor (DM est.): Protein 32.07%, Fat 17.39%, Carbs 31.52%, Fiber 10.33%.
Method note: carbs (NFE) were estimated by difference (100 − protein − fat − fiber − moisture − ash) on an as-fed basis and then converted to DM. Ash values were taken from labels when available or estimated (IAMS ash ~7%, others assumed 8%) — see sources.
Quick Data Table — Dry Matter Basis (Copyable)
| Product (DM) | Protein (%) | Fat (%) | Carbs (NFE) (%) | Fiber (%) |
|---|---|---|---|---|
| IAMS ProActive Health Adult | 35.56 | 16.67 | 36.67 | 3.33 |
| Purina ONE Indoor Advantage (est.) | 42.05 | 10.23 | 32.73 | 5.91 |
| Hill’s Science Diet Adult Indoor (est.) | 32.07 | 17.39 | 31.52 | 10.33 |
Short Product Notes (what labels say)
- IAMS ProActive Health Adult (label / retailer): Crude Protein 32% min; Crude Fat 15% min; Crude Fiber 3% max; Moisture 10% max. Often positioned as a value, balanced formula with prebiotics and omega fatty acids.
- Purina ONE Indoor Advantage (label / PDF): Crude Protein 37% min; Crude Fat 9% min; Crude Fiber 5.2% max; Moisture 12% max—DM conversion makes it look notably higher in protein.
- Hill’s Science Diet Adult Indoor (retailer listing used): Example label shows Crude Protein ~29.5% min; Crude Fat 16% min; Crude Fiber 9.5% max; Moisture 8% max—this formula emphasizes higher fiber for hairball control. Use official Hill’s pages for region-specific labels.
What the Numbers Mean — Actionable Takeaways
- Protein (muscle & maintenance): Purina ONE leads on a DM basis — useful for cats needing higher protein (active or lean-muscle maintenance). IAMS is moderate-high and fully sufficient for adult maintenance.
- Fat (energy & palatability): Hill’s and IAMS show higher fat % on DM than Purina ONE — more calorie dense, which is good for picky or underweight cats but requires portion control for indoor/less active cats.
- Fiber (hairball, stool quality): Hill’s indoor formula has the highest fiber (DM ~10.3%) — great for hairball-prone indoor cats. Purina ONE also has higher fiber than IAMS, which may help with satiety.
- Carbs (NFE): All dry kibble contains carbs; Purina ONE and IAMS sit in the low-to-mid 30% range on DM. If you aim to minimize carbs, consider complementing with high-protein wet food. (NFE estimates depend on ash assumptions.)
FAQ
Q: Is IAMS ProActive Health a complete and balanced food for adult cats?
A: Yes. IAMS ProActive Health is marketed as a complete adult maintenance diet — check packaging for AAFCO statements and consult your vet for special medical needs.
Q: Why convert to dry-matter basis?
A: ‘As-fed’ numbers include moisture, which obscures direct macronutrient comparisons. Dry-matter conversion removes moisture so you compare the nutrient density of the foods themselves.
Q: Which formula is best for hairball control?
A: Hill’s Science Diet Adult Indoor (higher fiber) and Purina ONE Indoor have fiber levels formulated to support hairball reduction and stool quality — consider those for long-haired or indoor cats.
Sources & Citations
- IAMS ProActive Health Adult — product pages / retailer labels (GA: Protein 32% / Fat 15% / Fiber 3% / Moisture 10%).
- Purina ONE Indoor Advantage — product PDF (GA: Protein 37% / Fat 9% / Fiber 5.2% / Moisture 12%).
- Hill’s Science Diet Adult Indoor — retailer product listing used for GA example (GA: Protein 29.5% / Fat 16% / Fiber 9.5% / Moisture 8%). Verify with your region’s Hill’s label page for exact numbers.
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