A final comment on the shock collar, anticipating the typical response by it's advocates, is the following...
"Well the dog is only shocked once or twice and then it's ONLY a beep".
Remember Pavlov's dog everyone? The dog that began salivating at the sound of the bell since it came to predict food? That is an example of classical conditioning and it is exactly what happens with the shock and the beep.
To Pavlov's dog, the bell became the food in the dog's mind. The bell produced the same physiological reaction in the dog as the food. In the use of shock collars and shock fences, the beep becomes the shock. The dog experiences the same physiological reaction to the beep as they did to the shock. They become one and the same and that is why it works! (That is, until the dog is sufficiently motivated to break through to follow a deer or rabbit and then too fearful to return as they'd have to endure the shock to enter back in to their own yard.)
For those that say the shock isn't painful? Look, if it wasn't painful, it wouldn't work. Is it the most painful thing ever experienced? No. But how many of you would be willing to put it on a three year old and try it out? Enough said.
Am I biased towards this type of training? Absolutely! Proudly so! Am I passionate about this subject? Certainly! Do I hope that others will take time to learn about these issues and cross over as I did? I very much do.
At the same time, I believe firmly that everyone who works with dogs, loves dogs. I don't think any trainer of any method is clasping their hands thinking...."hmmm, how can I hurt a dog next". All I'm saying now, all I've ever said is this:
If there is a way to train your dog just as well, if not better and without the risk of any fear, without physical discomfort and without the potential of fallout (such as the development of behavior problems from training)...
Why wouldn't you want to do that?
In other words, if you can get a wonderfully trained and well behaved dog using positive reinforcement and negative punishment methods, why on earth would you want to use a technique that at best the dog wouldn't exactly love and at worst could create more problems than you started with?