Here are natural/“natural-style” pet food companies (brands) available in Australia that offer grain‑free cat food options. I included a short note about each and a source you can check for current product ranges:

• Ivory Coat — Australian brand; entire cat range is marketed as grain‑free (dry and wet options). (petstock.com.au)
• Black Hawk — Australian brand with a dedicated grain‑free cat range (wet & dry formulas). (blackhawkpetcare.com)
• Feline Natural — New Zealand natural/free‑range brand (freeze‑dried & canned) sold in Australia; most recipes are grain‑free. (naturalpetstore.com.au)
• ZIWI Peak — New Zealand air‑dried / canned brand sold in Australia; recipes are high‑meat and grain‑free. (myrainbowpets.com.au)
• K9 Natural (Feline line) — NZ brand with grain‑free freeze‑dried/complete cat products available in Australia. (petsonthepark.com.au)
• Applaws — natural/limited‑ingredient cat foods (dry & wet) with grain‑free recipes sold in Australia. (applaws.com.au)
• ORIJEN — high‑meat, “biologically appropriate” (grain‑free) cat diets widely sold in Australia. (chokyo.com.au)
• Instinct (Nature’s Variety) — raw‑inspired natural brand with grain‑free wet, dry and freeze‑dried cat options available in Australia. (espot.com.au)
• Open Farm — ethically‑sourced natural brand with grain‑free cat recipes (sold in Australia via local distributors). (openfarmpet.com.au)
• Fussy Cat / Tucker (Tuckers/Fussy Cat retail brand) — Australian made grain‑free cat chilled/dry lines (sold through Tucker stores). (carine.shop.tuckerfresh.com.au)

Notes:

• This is not exhaustive — many smaller / boutique Australian retailers and private‑label ranges also offer grain‑free cat foods.
• Product availability, exact recipes and “grain‑free” claims can change; always check the product label or the brand’s official site for the current ingredients and feeding guidance.

If you’d like, I can: filter this list to Australian‑owned companies only, show which brands sell dry vs wet vs freeze‑dried grain‑free cat food, or find local stockists for any specific brand.