Here are widely available dog-food brands/formulas in Australia that are specifically formulated for digestive support, with a short note on each:

• Hill’s Prescription Diet — i/d (Digestive Care): therapeutic diet formulated for digestive upsets, highly digestible with prebiotic fibers (ActivBiome+). Prescription veterinary diet. (hillspet.com.au)

• Royal Canin — Gastrointestinal (Veterinary range): veterinary-exclusive formula for acute/chronic diarrhoea and maldigestion; high digestibility and prebiotics for microbiome support. Usually only available through vets. (royalcanin.com)

• Purina Pro Plan Veterinary Diets — Canine EN Gastrointestinal (and Low‑Fat EN variant): veterinary diet designed for vomiting/diarrhoea, pancreatitis and malabsorption; highly digestible with prebiotic fibre and MCTs. Typically sold through vets/vet suppliers. (Purina.com.au)

• Hill’s Science Diet — Sensitive Stomach & Skin (Adult and breed/lifestage variants): over‑the‑counter formula aimed at dogs with sensitive stomachs; includes prebiotic fibre and is marketed for easier digestion (non-prescription). (justforpets.com.au)

Notes and quick guidance

• “Veterinary” or “Prescription Diet” formulas (Royal Canin Gastrointestinal, Hill’s Prescription Diet i/d, Purina Pro Plan Veterinary Diets EN) are intended for dogs with medical GI conditions and are usually recommended/prescribed by a veterinarian. Follow your vet’s advice when using them. (royalcanin.com)
• Over‑the‑counter options (e.g., Hill’s Science Diet Sensitive) can help milder food‑sensitivity or “sensitive stomach” issues but may not be appropriate for serious GI disease. (hillspet.com.au)
• If you want more brand options (including Australian‑made or limited‑ingredient/novel‑protein diets for food‑sensitive dogs), I can look up local availability and compare ingredient approaches and price points — I’ll check current Australian retailers and vet‑only availability if you’d like.