Very easy. I wrote and article, that has been published in several magazines, about just this issue. Here is the link to it:

http://giftofgracekennels.com/id56.html

Luca and Ajax are currently going through this training since I am due in 5 days. Sheena has already been through it as you will read. The sooner you start it teh better. Good luck and let me know if it helps.
Nicole & Sheena & Ajax