Methodology
How we test dog harness
Five criteria decide whether a no-pull harness suits your dog. Here is each one, and how the Heelbrook front-clip harness answers it.
Our criteria
- A ring at the chest. A harness only redirects a pulling dog if the leash attaches on the breastbone, ahead of the centre of mass. On a back-attachment harness, peak leash tension rose from 6.97 N on a plain collar to 16.87 N (Shih et al., 2021); a front-attachment harness cut pulling against a martingale and matched a metal prong collar (Johnson & Wynne, 2024). The Heelbrook front-clip harness carries a chest D-ring as its working attachment, plus a back D-ring for relaxed walks.
- Adjustment at the neck and at the girth. Without neck adjustment the chest panel cannot be lowered, and a panel riding up on the throat catches the front legs on every stride. This harness has four adjustment points: two at the neck, two at the girth.
- A size chart that matches real dogs. Sizes run S to XL, covering a 43 to 107 cm chest, and the chart runs generous: two 35 kg Labradors fitted into a size L that the chart caps at 30 kg, both with adjustment to spare, and a 38 kg dog found XL loose. Between two sizes, take the smaller one.
- Hardware and handle. Two plastic side-release buckles, as across this whole category. Buyer reports differ on whether the chest ring is metal or plastic; on a dog over about 35 kg, a double-ended leash on both rings means no single attachment carries the whole load. The padded top handle is for steadying a dog at a kerb or a vet door, not for lifting.
- Claims with a named study behind them. Every figure about pulling on this site carries an author, a journal and a year, listed below. The 70–90% pulling-reduction figures that circulate in this category trace back to commercial blogs citing nothing, and none is quoted for this harness.
Every order ships free across the United States, with 30 days to send it back if the fit is wrong.
The studies behind the figures
Five papers underpin every claim about pulling on this site. Here they are in full, so you can check them directly.
| Study | Sample | What it found |
|---|---|---|
| Shih et al., Frontiers in Veterinary Science 8:735680 (2021) | 52 shelter dogs, 16–43 kg | Peak leash tension 16.87 N on a back-clip harness vs 6.97 N on a collar; time spent pulling roughly doubled |
| Johnson & Wynne, PeerJ 12:e18131 (2024) | 23 dogs, four equipment types | Front-clip harness cut pulling vs a martingale (p = 0.001) and matched a metal prong collar |
| Pauli et al., JAAHA 42(3):207–211 (2006) | 51 eyes of 26 dogs | Intraocular pressure rose significantly through a collar, not through a harness |
| Grainger, Wills & Montrose, J. Vet. Behavior 11:60–64 (2016) | 30 pet dogs | No measurable stress-behaviour difference between collar and harness walking |
| Townsend et al. (2021), cited in Johnson & Wynne | Owner survey | 82.7% of owners report their dog pulls on the lead |