Here are cat‑food brands sold in Australia that explicitly highlight high‑protein formulas (short note + example claim / protein level and a source you can check):

• ORIJEN — markets “biologically appropriate” high‑protein recipes (e.g., Cat & Kitten ~40% crude protein). (petsarea.com.au)
• ACANA — many grain‑free regional recipes promoted as high‑protein (typical guaranteed protein ~36%). (myrainbowpets.com.au)
• ZIWI Peak — air‑dried “whole‑prey” recipes with very high meat content (examples: 36–45%+ crude protein depending on flavour). (rawpetco.com.au)
• Instinct (Nature’s Variety) — Raw Boost / Original lines marketed as high‑protein (many recipes 37–42%+ crude protein). (instinctpetfood.com)
• Applaws — grain‑free formulas that advertise high animal‑protein content (e.g., ~37% protein in some dry recipes). (applaws.com.au)
• Purizon — European brand sold in AU markets; positioned as “particularly protein‑rich” (many recipes ~42–44% protein). (zooplus.com)
• Nutrience SubZero — promoted as a high‑protein (kibble + freeze‑dried raw) range (typical crude protein ~38–42% depending on formula). (nutrience.com)
• Black Hawk (Australian) — promotes real‑meat first ingredients and high‑protein recipes (examples list crude protein ~33%+; grain‑free varieties claim higher meat %). (blackhawkpetcare.com)
• Farmina (N&D) — premium lines with meat‑forward/low‑carb formulas; some recipes list very high protein (30%–46% in specific N&D lines). (perro.at)
• Tiki Cat — wet food range explicitly promoted as very high‑protein (wet and dry lines marketed up to very high protein on a dry‑matter basis). (tikipets.com)

Notes:

• “High‑protein” claims and guaranteed analysis (crude protein %) vary by specific recipe/flavour — always check the product’s guaranteed analysis on the pack or the brand’s product page for the exact number.
• Formulations and retailer availability can change; the citations above point to current product pages/retailer listings you can use to verify specific recipes and pack sizes.