Below are reputable premium natural dog‑care brands (food, treats and grooming) that advertise formulations with no artificial preservatives. I’ve grouped them by product type and noted how they preserve products when relevant — formulations can change, so always check the current ingredient panel on the pack or the brand website before buying.

Premium dog foods & treats (no artificial preservatives)

• ZIWI (air‑dried / canned / toppers) — air‑dried process “locks in the goodness … without the use of artificial preservatives.” (ziwipetfood.com.au)
• K9 Natural (freeze‑dried / frozen raw; NZ brand) — freeze‑dried/frozen raw ranges; advertise “no additives, artificial preservatives.” (petswonderland.co.nz)
• Orijen (Champion/Orijen; fresh/freeze‑dried/kibble) — states freeze‑dry process and “without the addition of synthetic preservatives.” (intl.orijenpetfoods.com)
• Acana (sister brand to Orijen) — advertises “no artificial preservatives added in our kitchen” (especially their freeze‑dried and treats lines). (apac.acana.com)
• The Honest Kitchen (dehydrated human‑grade foods, toppers) — advertises no artificial preservatives, colors or flavors. (petcodogcare.com)
• Merrick (premium US brand) — many recipes state “we don’t use artificial preservatives.” (merrickpetcare.com)
• Fromm Family (wet & dry lines) — many product pages state “no artificial colorings, dyes or synthetic preservatives.” (frommfamily.com)
• Open Farm (sustainability‑focused; dry, freeze‑dried, toppers) — states recipes are free from artificial colours, flavours and preservatives (use natural antioxidants like mixed tocopherols). (openfarmpet.com.au)
• Ivory Coat (Australian premium brand) — marketed in Australia with “no added artificial colours, flavours or preservatives” (naturally preserved formulations). (ivorycoat.com.au)
• Black Hawk (Australian premium brand) — states wet & dry foods use only natural preservatives (rosemary extract, tocopherols, vitamin C) and no artificial preservatives. (blackhawkpetcare.com)

Premium grooming / skin & coat care (natural, minimal synthetic preservatives)

• Earthbath — widely used natural pet shampoos (fragrance‑free and scented lines) formulated without parabens, sulfates, phthalates and many synthetic additives; marketed as plant‑based/biodegradable. (shop.leafscore.com)
• Burt’s Bees for Pets — natural‑ingredient shampoos and conditioners; marketed as largely naturally derived and free from harsh chemicals, dyes and many synthetic additives (check each product label for preservative ingredients). (aquabluedistribution.com.au)

Quick notes and buying tips

• “No artificial preservatives” often means the product either: (a) is preserved naturally (mixed tocopherols = vitamin E, rosemary extract, vitamin C), or (b) uses processing that reduces need for synthetic preservatives (freeze‑drying, air‑drying, fresh/frozen raw). Check product pages/labels for terms like “mixed tocopherols,” “rosemary extract,” “vitamin E,” or “freeze‑dried / air‑dried.” Examples in the brands above show those approaches. (ziwipetfood.com.au)
• Formulations and sourcing can change. If your dog has allergies or medical needs, confirm the exact ingredient list for the batch you’re buying and consult your vet before switching diets. (Availability and specific SKUs may vary in Australia.)
• If you want, I can: (a) compare 2–3 specific products (ingredient lists + preservative details), or (b) find local Australian retailers that stock any of these brands and show current availability/prices.

Would you like a comparative shortlist (e.g., best air‑dried, best freeze‑dried topper, best Australian‑made) with ingredient highlights and where to buy in Australia?