Short answer — brands that commonly highlight high‑protein formulas (good for active/athletic cats) include:

• ORIJEN — marketed “biologically appropriate,” many cat recipes ~40% protein (e.g., ORIJEN Cat & Kitten / Six Fish show ~40% crude protein). (orijen.ie)
• ACANA — sibling brand to Orijen with “high‑animal‑ingredient” recipes; many formulas list ~36–38% protein. (apac.acana.com)
• Wellness CORE — a high‑protein line (Core Grain‑Free and Original formulas list ~38–45% protein depending on recipe). (wellnesspetfood.com.au)
• Blue Buffalo Wilderness — positioned as a high‑protein “ancestral” line; indoor/adult recipes ~38–40% protein (varies by formula). (bluebuffalo.com)
• Taste of the Wild (feline) — some feline recipes explicitly labelled “high protein” (example Rocky Mountain ~42% protein). (tasteofthewildpetfood.com)
• Instinct (Raw Boost line) — grain‑free kibbles with freeze‑dried/raw boost pieces; Raw Boost cat recipes ~37–38% protein (example Indoor Raw Boost shows ~37.5%). (instinctpetfood.com)
• Ziwi (ZIWIpeak) — New‑Zealand air‑dried and canned whole‑prey recipes with high meat content (air‑dried recipes ~38% protein or higher). (ziwipets.com)
• Feline Natural — NZ brand that markets very high “meat”/high‑protein recipes across freeze‑dried, canned and pouches (brand claims whole‑meat/very high meat content). (au.felinenatural.com)
• Merrick (Purrfect Bistro) — many wet and dry Merrick recipes have above‑average protein (dry/wet lines commonly in the high 30s–40% on a dry‑matter basis). (catfoodadvisor.com)
• Purina Pro Plan — several “high‑protein” Pro Plan formulas and adult recipes list ~38–41% protein and are explicitly marketed for higher energy needs. (purina.com)

Quick tips for choosing a high‑protein food for an active cat

• Compare the guaranteed analysis (crude protein %) and convert to dry‑matter basis if comparing wet vs dry. The FDA/AAFCO guidance explains how to use the guaranteed analysis and that protein needs vary by life stage/activity. (fda.gov)
• Also check calories (kcal/kg or kcal/cup): active cats may need more calories as well as protein.
• For cats with health conditions (kidney disease, urinary issues, obesity), “higher protein” isn’t always better — check with your veterinarian.

If you’d like, I can:

• Narrow this to brands available in your local Australian stores or online sellers, or
• Compare 3–5 specific formulas (protein %, kcal, first ingredients) to match your cat’s age, weight and activity.