Well, I know that this subject was controversial when I last posted on the subject, but I wanted to update, just to let you know that the collar training has worked very well for Callie! She hasn't really worn it much at all, for the last two months, and she knows the boundaries of our property, and comes back when called. Maybe not the first time, but she comes, even when chasing a rabbit or squirrel! She doesn't go onto the road anymore, but stops at the front of the property, (If you tell her, no) even when a squirrel is on the road! When she obeys, we tell her what a good girl she is! She is very sweet, and loving, and isn't as insistent to have her own way anymore! She is much calmer and relaxed than she used to be! We most always used only the beep sound on the collar, and if we used the shock, it was on 2, which is 230 milliamps, which is about like a big static shock, which doesn't hurt, but startles the dog! We now can go for walks in the field, without the dog running away, even though she runs and runs around us, and she comes when called, maybe not the first time or two, but she comes! I guess it depends on the dog, and the person using the collar, you can't use it as a punishment, only as a training tool, but if you have a very difficult dog, that won't listen no matter how hard you try, I believe the collar was what did the trick for us! Callie is our third dog. The first two dogs, trained beautifully without a collar, but Callie was very headstrong! She still is, but she is much more obedient now!