We have a Patterdale terrier cross who loves to go out and pull on his lead, thus causing him to stop every few minutes and choke which was quite unnerving. After reading on the net about small dogs with short windpipes choking whilst pulling on their leads we decided we needed a solution. And here it is the "Non Pull Harness" with a very reasonable price, easy to assemble and fit onto the dog. After his walk WITHOUT any choking sessions he was really pleased with himself! Would highly recommend this product.