We have tried every variety of harness out there, but our good natured dog always ran from them, unusual behavior for her. I took a chance on this one and she loves it as do I— so easy to get on and off. At first, I ordered a medium for our 18 pound mini poodle mix, but it was too large. I appreciate the excellent service we got when we called to say we needed a small. We will now be donating at least half a dozen expensive harnesses to the local Humane Society as this one is the only one we wil...