I love the education you get here on YT. Please don't feel bad for not knowing about the dangers of using a collar on a small dog. I once saw a Cesar Millan show where he tried to put a collar on a Yorkie. The owner felt very uncomfortable and he reluctantly changed to a harness.
We can all learn, and we can all educate others. Thanks to everyone on YT, I have learned so much to keep my furpup healthy, happy, and , of course, well-dressed--heehee!