How We Test and Choose Products

DPR is primarily a research-led buying-guide site, not a product-testing laboratory. We compare documented specifications, explain the buying decision and state what we could not verify. Two historical harness accounts are labelled owner-reported; neither is a documented hands-on test.

Evidence levels

• Research-led. Current exact-product sources, independent or professional guidance where relevant, and clearly attributed owner questions. No direct-use result or numerical product score.
• Owner-reported. A named historical owner account exists, but the complete receipt, product identity, dated images or use log is not archived. It can be presented as anecdotal context, never as a verified durability rate, universal fit result or scored test.
• Mixed evidence. Research sources plus at least one documented direct-use protocol. Only the observations actually captured are described as ours.
• Hands-on tested. Exact variant, purchase or loan status, dated original images, protocol, raw observations, measurements, deviations and editor sign-off are retained. Even this level does not turn a normal-use test into medical, crash-safety or population-wide evidence.

What we compare

The relevant criteria depend on the job: a brush, GPS tracker and car restraint cannot sensibly share one score. Our current pages use qualitative recommendations, not numerical product ratings.

No invented stars or test results

No current DPR page has the documented first-hand evidence needed for a scored test. We therefore publish no numerical product score, customer-rating aggregate or Review rich-result markup. A missing score means “not scored”, not zero.

If we publish a scored test in future, it will need a product-specific protocol declared before testing, an exact variant, acquisition disclosure, dated original photographs, relevant dog measurements, raw observations and a clear explanation of each criterion. A small normal-use trial cannot establish medical benefit, crash protection or population-wide comfort.

How We Evaluate Products

A page should identify the evidence it actually uses. These are possible sources, not a claim that every product has all four:

• Manufacturer specifications and materials. Exact model, sizing, material, care and warranty information where published. Missing measurements stay unknown; manufacturer claims are not relabelled independent test results.
• Customer-feedback summaries. These require a documented, permitted source, relevant variants, dates and a stated sample. We do not copy Amazon reviews, star averages or customer photographs into our own verdicts.
• Professional and welfare guidance. Published advice helps set boundaries; it does not imply a vet or groomer endorsed our shortlist. Relevant sources may include:
  • RCVS (Royal College of Veterinary Surgeons)
  • BVA (British Veterinary Association) position statements
  • PDSA Pet Help and the annual PDSA Pet Wellbeing Report
  • Dogs Trust education content
  • Battersea pet advice
• Owner-community problems. Public breed forums and communities can reveal recurring questions and failure modes. They guide what we investigate; anonymous comments do not override manufacturer documentation, independent testing or veterinary guidance.

What we don't do: we do not claim paid testing panels, lab results we did not run, or owner-surveys we did not conduct. Where we reference original UK owner survey data, the methodology and sample size are stated on the page.

Open evidence assets

When a comparison benefits from a reusable source record, we publish the source trail and limitations as an open data asset. Our UK dog booster-seat evidence register separates historical independent findings, manufacturer-reported testing and models for which no independent evidence was located. Our UK dog brush and comb fit register records exact product, variant and bundle specifications, leaves missing pin or tooth lengths labelled “not published” and adds a conservative coat-and-job filter. The UK dog collar size and care register keeps 33 published size bands, maker rules, care and evidence limits attached to eight exact product families.

These registers are source research, not safety certificates or original product tests. The booster-seat register exposes its evidence trail and downloadable files; the brush register follows the same open-data pattern without claiming a performance ranking; and the collar register retains source status and exclusions rather than estimating missing bands. Their purpose is to make the evidence boundary visible and give readers, journalists and specialists correction-ready records they can inspect.

How we choose what to improve

Reader questions, source changes and Search Console can identify an existing guide that needs attention. We improve that guide before creating another URL for the same need. A keyword alone does not justify a page: it must answer a distinct buying question and add useful evidence, a comparison or a decision tool.

We use AI assistance for research organisation, drafting and technical checks. That assistance is not first-hand experience or professional expertise. Important factual claims still need an identifiable source, and a page with a material evidence, safety or compliance failure must be corrected before publication. There is no minimum word count or automatic quality score.

What can exclude a product

A product can be excluded or made conditional when the current evidence exposes a material buyer risk:

• The exact linked model or size is unavailable, inaccessible or different from the product described.
• The manufacturer instructions or published fit range conflict with the proposed use.
• A safety-sensitive claim lacks the necessary independent evidence or is broader than the disclosed test.
• The buyer cannot identify a suitable UK size, current seller, return route or material product limitation before checkout.
• The recommendation would rely mainly on anonymous reviews, a star average or an undocumented personal story.

How Often We Update

A guide's updated date changes only after a material source, product, destination or editorial review. We prioritise a recheck when:

• A recommended product is discontinued or significantly changed
• A clearly better alternative appears on the UK market
• We receive consistent reader feedback that a recommendation no longer holds up
• Seasonal changes warrant different recommendations (winter vs summer gear)
• Search Console or measured outbound behaviour identifies a material existing-page opportunity

A Note on Affiliate Links

Amazon Associates is the site's only live affiliate programme at present. When an Amazon affiliate link leads to a qualifying purchase, we earn a commission at no extra cost to the reader. Useful direct manufacturer or retailer links remain labelled as non-affiliate in the site data. The site will update its disclosure before activating any additional earning programme.

Affiliate commissions do not influence which products we recommend. Our shortlist is decided before any links are added. Products with higher prices or better commission rates do not get preferential treatment. If a £20 product genuinely outperforms a £60 one for a specific use case, the £20 product gets the recommendation.

We disclose all affiliate relationships clearly on every page and on our affiliate disclosure page.