oh that happened to nina as well! my bf and i came home from watching a movie, and who knows how long the collar was stuck like that! i felt so bad... there was blood all over the collar because nina was also teething at the time. our trainer recommended getting a leather collar with an ordinary belt-buckle-like clasp, not the plastic kind that click with the extra loop, because apparently a yorkie can get caught in the loop too. surprisingly, as nina has been fighting the collar ever since i've tried to get her to wear it, she likes this one. but yeah, what a scary experience!