I HATE shock collars and never recommend them. When I started training Dixie for hunting, those who had been doing it and were considered pros recommended I use a shock collar to train her. I was told that she would never be much of a hunter unless I did. I refused and instead worked her using positive reinforcement and clicker training. It may of taken a bit longer (not much) than shocking her but if you could see her hunting and the love she has for it, it was worth the extra time. She now has her Senior Hunter Title! Many of the dogs trained using collars have fear built in and it shows.

I believe shock collars are the lazy persons way out of training positively.