Here are brands that produce hypoallergenic / allergy‑friendly dog food options. I’ve grouped them by type (prescription hydrolysed clinical diets vs. over‑the‑counter limited‑ingredient or novel‑protein formulas) and noted when a formula is typically veterinary‑prescription only.

Prescription (hydrolysed / veterinary) — usually sold or recommended through vets:

• Hill’s Prescription Diet — z/d (hydrolysed protein formulas for food sensitivities). (hillspet.com)
• Royal Canin Veterinary Diet — Hypoallergenic / Hydrolysed protein veterinary formulas. (royalcanin.com)
• Purina Pro Plan Veterinary Diets — HA (hydrolysed protein) and related clinical formulas. (purina.com.au)
• Blue Buffalo Natural Veterinary Diet — HF (hydrolysed) veterinary hydrolysed options. (bluebuffalo.com)

Over‑the‑counter (non‑prescription) limited‑ingredient, novel‑protein, or “sensitive” lines (commonly used for suspected food sensitivities):

• Natural Balance L.I.D. (Limited Ingredient Diets). (petsenseshop.com)
• Zignature (novel / single‑protein formulas such as kangaroo). (zignature.com)
• Canidae PURE (limited‑ingredient “PURE” line). (canidae.com)
• Wellness Simple (limited‑ingredient recipes). (wellnesspetfood.com)
• Instinct (Limited Ingredient Diet line — single protein / single veggie). (instinctpetfood.com)
• NUTRO Limited Ingredient Diet (LID) recipes. (nutro.com)

Australian / regional brands with “sensitive” or single‑protein options (available in Australia):

• Ivory Coat — Sensitive / Single‑protein / “Sensitive Care” / Raw Health sensitive recipes. (fishandfeather.com.au)
• Black Hawk — Grain‑free / sensitive recipes (marketed for dogs with sensitivities). (blackhawkpetcare.com.au)
• ADVANCE (Australian) — Sensitive Skin & Digestion formulas. (petmegastore.com.au)

Notes and quick guidance

• “Hypoallergenic” in pet food usually means either a hydrolysed protein veterinary diet (clinical, least likely to trigger reactions) or an OTC limited‑ingredient / novel‑protein formula (single/rare protein, fewer ingredients). Prescription hydrolysed diets are typically recommended when a vet has diagnosed food allergy or for formal elimination trials. (hillspet.com)
• If you suspect a true food allergy, the standard approach is a vet‑supervised elimination trial (and/or use of a hydrolysed prescription diet). Check with your veterinarian before switching foods. (hillspet.com)

If you’d like, I can:

• Narrow this list to just brands available where you are in Australia (I can check local availability/pricing), or
• Suggest specific formulas for skin vs digestive signs, or
• Explain how to run a veterinary elimination diet/trial and what to expect.

Which of those would help you most?