I use a prong collar when I walk my dog. His lead got looped over his head, and in his efforts to 'correct' it, he contorted just enough that the collar came off . It is NOT a quick release collar. He looked down at his collar, looked at me, and ran away. I was all at once scared, angry (at myself), panic stricken. So after calling him and searching for 15 minutes, he came up to the car and was ready to come home. I am meticulous about how I attach his collar, I make sure all his equipment is in proper operating condition. From now on I will attach his lead not only to the prong collar, but also to his regular collar. I won't let this happen again. My dog is still learning recall. My point is, unless your dog is perfect on recall, check his / her collar (whatever kind you use) twice before taking that walk. It was scary to think what could have happened.