Review methodology

Scope and applicability. This method covers dog waste bags, dispensers, waste stations, bin liners, odor-control gear and related accessories, using records of the applicable equipment, sample sourcing, test dates and observations. A test is used only for the product category it can assess; a procedure for another product does not establish this product’s performance.

Initial bench-and-field phase. The initial bench estimate is 8–14 days; field walks require two full weeks. Report these timelines separately: bench work may overlap field use, but do not describe eight days as completing the full two-week field protocol. At intake, photograph the pack and record the listed gauge, count, bag dimensions, price, UPC and lot code. Use a digital micrometer to read film thickness at five points on each of ten bags; report the median. Use a spring gauge to pull each bag's bottom seam and each handle to failure, recording load in kilograms. Fill each bag with 400 ml of water, tie it as a walker would, and leave it on paper for 30 minutes; record any seep. Open and close clip claws 500 times, then load them with a full roll. Field walks involve three households and five dogs for two weeks on morning and evening walks, logging tie time, tear count, knot failures and pickup-to-bin time.

Separate stages. For an odor panel, place tied bags in a sealed 20-liter bin, with four panelists rating at 24, 48 and 72 hours on a fixed scale. For a cold check, rest ten bags at 0°F for 12 hours, then handle them outdoors in winter conditions and check for shatter and cracking. A compost watch, if applicable, is a separate long stage: place bags sold as compostable in a home compost bay and inspect them at 4, 8 and 12 weeks for disintegration. The 12-week compost watch is not a compostability certification and is separate from the 8–14 day initial phase. Calculate cost per bag and cost per walk from verified pack price, actual count and the relevant use log. Cost per kilogram is a method parameter that requires confirmation of what the kilogram denominator represents, its measured basis and category applicability; do not publish this figure until those definitions and records are confirmed.

Scoring and recommendation. If the full protocol is completed and logged, a product may receive a five-point score, with higher better. The five-point scale is not limited to 4–5; it may use the full range, with 5 excellent, 4 good, and lower values indicating problems. Recommendation inclusion is separate from scoring: a guide may require a published minimum threshold, provisionally 4.0, but that threshold is not the scoring scale. Products that fail leak or seam tests must not be silently deleted; record them in a failure or non-recommendation log with reason, date and applicable test.

Retests. Retest 12 months after publication, or sooner if formulation, resin supplier or closure design changes, or if three or more verified reports of leaks, tears or handle failures are received. Report retest dates only from actual records.