Short answer — both veterinary (prescription) and retail dog‑food brands sold in Australia make formulas specifically for digestive support. Common brands and example product lines you’ll see locally are:

Veterinary / prescription therapeutic diets (usually sold through vets or vet clinics)

• Hill’s Prescription Diet — i/d (Digestive Care; adult, puppy, low‑fat variants). (hillspet.com.au)
• Royal Canin (vet range) — Gastrointestinal (formulated for acute/chronic diarrhoea, malabsorption etc.; veterinary exclusive). (royalcanin.com)
• Purina Pro Plan Veterinary Diets — CANINE EN (Gastrointestinal) for vomiting/diarrhoea, malabsorption and related issues. (purina.com.au)

Retail / over‑the‑counter formulas (available at pet stores & online)

• Royal Canin — Digestive Care (retail range for dogs prone to digestive sensitivity). (royalcanin.com)
• Hill’s Science Diet — Sensitive Stomach & Skin (aimed at microbiome/digestive support and skin). (justforpets.com.au)
• Purina Pro Plan — Sensitive Skin & Stomach / Sensitive Digestion (retail sensitive‑stomach lines). (purina.com.au)
• Eukanuba — Daily Care Sensitive Digestion (formulated for sensitive stomachs). (eukanuba.eu)
• BlackHawk — Healthy Benefits Sensitive Skin & Gut (Australian brand with pre/probiotics and fibres for gut support). (blackhawkpetcare.com.au)
• Advance — Sensitive Skin & Digestion (Australian made line for sensitive digestion & skin). (petfood.advancepet.com.au)
• Forza10 — Active / Intestinal Support / Sensitive Digestion formulas (marketed for intestinal/colon support; available in AU retail channels). (zuzu.land)
• Ivory Coat — Sensitive / Grain‑free Sensitive formulas (single‑protein / prebiotic fibre to help digestion). (ivorycoat.com.au)
• Prime100 and some fresh/frozen brands — offer “sensitive stomach” / single‑protein or pumpkin‑enriched ranges aimed at digestive support. (prime100.com.au)

Quick notes and practical tips

• Prescription vs retail: therapeutic “gastrointestinal” diets from Hill’s Prescription Diet, Royal Canin Veterinary Gastrointestinal and many Purina Veterinary Diets are formulated for medical problems and typically require a veterinary recommendation or are sold through veterinary channels. Retail “sensitive digestion” ranges (Science Diet Sensitive Stomach, Pro Plan Sensitive, Royal Canin Digestive Care, etc.) are available without a prescription. (hillspet.com.au)
• Ingredients and approaches vary: common strategies include highly digestible proteins/carbs, added prebiotics/probiotics, soluble/insoluble fibre blends (e.g., beet pulp, psyllium), medium‑chain triglycerides or low‑fat formulas (for pancreatitis) and single‑protein or novel‑protein recipes for food‑sensitivity trials. Check each product’s ingredient/benefit list before switching. (purina.com.au)
• If your dog has ongoing vomiting, diarrhoea, weight loss, blood in stool, or other worrying signs — see your vet before changing food; some conditions need medical diagnosis and a prescription diet. (hillspet.com.au)

If you’d like, I can:

• Narrow this to brands sold in your city or at a specific retailer (Petbarn, Petstock, local vet) and check availability/prices; or
• Suggest which type of formula (prescription vs retail; low‑fat; single‑protein; high‑fibre; prebiotic/probiotic) might suit a particular symptom (loose stools, chronic gas, pancreatitis, suspected food allergy).

Which would you prefer?