How to Read Dog Supplement Labels: What to Look For and What to Avoid

The active ingredients are the compounds that do the work. The first thing to check is whether the doses are therapeutic, meaning high enough to produce a biological effect based on the available evidence. A label that lists glucosamine without specifying the dose per serving, or lists it at 50mg per serving (versus the 800mg per scoop in Petz Park Hip and Joint for Dogs), is using the ingredient as a label decoration rather than a functional component. Proprietary blends are particularly problematic: they list multiple ingredients under a single collective weight, making it impossible to know whether any individual ingredient is present at a meaningful dose. Petz Park does not use proprietary blends. Every ingredient is listed with its exact per-scoop dose. The glucosamine ingredient page lists the doses used in clinical research for context.

Inactive ingredients include binders, fillers, preservatives, flavourings and flow agents. In tablets and soft chews, multiple inactive ingredients are needed to hold the product together. Some of these (soy flour, corn starch, certain preservatives) can trigger sensitivity in dogs with allergies or digestive issues. Powders have far fewer inactive ingredients because they do not need binders or stabilisers to maintain a physical form. Petz Park's formulas are all in powder form specifically to minimise inactive ingredients and maximise the active content per serving. A simple inactive ingredient list is a quality indicator.

GMP (Good Manufacturing Practice) certification means the manufacturing facility operates under independently audited standards for ingredient sourcing, production processes, testing and record-keeping. In Australia, APVMA approval means the facility meets the regulatory requirements of the national authority for veterinary chemical products. These are not marketing claims: they require ongoing third-party verification. A product manufactured in a GMP-certified facility is significantly more likely to contain what the label states at the stated dose. Petz Park supplements are manufactured in GMP-certified, APVMA-approved facilities in Australia. See the Quality and Safety page for details.

Terms like clinically proven, vet-approved and scientifically formulated are used widely and mean very little without specifics. The questions to ask are: proven in what study, with what population, over what duration, published where? For the dental supplement ingredient Ascophyllum nodosum, Petz Park can cite a specific 2018 double-blind RCT in Frontiers in Veterinary Science showing 46 percent plaque reduction at 90 days with a VOHC Seal of Acceptance. That is a citable, verifiable claim. For other ingredients, the honest position is to describe the mechanism and indicate where the evidence is strong versus where it is limited. Avoid brands that make specific efficacy claims without any citable source. The Ascophyllum Nodosum ingredient page covers the full evidence base.

Country of manufacture affects quality control. Australia has GMP and APVMA manufacturing standards that are among the most rigorous available. The Australian Made certification, administered by the Australian Made Campaign Ltd, is independently verified: it cannot be self-declared. Many products marketed as Australian are only packaged here, with ingredients sourced and processed offshore. Australian Made certification confirms that the manufacturing, not just the packaging, takes place in Australia. See the Australian Made page for details.