[mekanicalsyncop]

>I don't think there is any way you can train a random dog to this level on your own.

I pretty much agreed in my comment. People try anyways because they've tried everything else and don't have the money.

>Also the trainers select dogs that exhibit the right temperment at a very young age.

There are lots of breeders now that offer to help you find a dog with the right temperment. I'm not sure how legitimate they are though.