Here are Australian-available companies that produce complete, balanced diets formulated specifically for indoor cats (dry and/or wet formulas). I’ve listed the brand/company and a representative indoor product page you can check for ingredients, feeding guides and nutritional claims:

• Royal Canin (Mars Petcare) — Royal Canin Indoor (complete diets for adult indoor cats). (royalcanin.com)
• Hill’s Pet Nutrition (Hill’s Science Diet) — Science Diet Adult Indoor formulas. (vetslovepets.com.au)
• Purina (Nestlé Purina) — Purina ONE / PRO PLAN Indoor / Indoor Hairball Control formulas. (Purina.com.au)
• Black Hawk (Australian-made brand) — Black Hawk Healthy Benefits Indoor (wet & dry indoor formulas, complete & balanced). (blackhawkpetcare.com.au)
• Advance (Australian brand) — Advance Indoor Chicken & Rice (Australian-made complete indoor cat diets). (all4pets.com.au)
• Ivory Coat (Australian brand) — Ivory Coat Indoor & Hairball recipes formulated for indoor cats. (petstock.com.au)

Notes and tips

• “Balanced/complete” on packaging means the product is formulated to meet established nutrient profiles for maintenance (check the label for AAFCO, FEDIAF or manufacturer nutrition statements). If you want a product matched to a particular age, neuter status, weight or health condition (urinary disease, obesity, hairball issues), choose formulas targeted to those needs or ask your vet.
• Ingredients, guaranteed analysis (protein/fat/fibre), and feeding guides vary between products — always check the product page or the bag/tin for the current formulation and feeding instructions. The product pages cited above include nutritional information and feeding guides. (royalcanin.com)

If you’d like, I can:

• Compare 2–3 specific indoor formulas (protein/fat/fibre, calorie content, key functional additives) side-by-side; or
• Find which of these brands’ indoor formulas are sold nearest you (local stores / online retailers) — tell me your city or postcode.