[excellrott]

If you can't turn it at all, I would say it is slightly too tight. My collar is such that if I can't add or remove rings, I can adjust it at the clasp Try it the other way, I don't have any problem getting it up high enough on the neck and putting the ring on top to start with. I'm no expert, but I just started using the prong and it's true that it is like power steering for dogs!