I'll pass along a technique from our first siberian's puppy classes - don't draw your hand back, but push it forward in towards his/her mouth (of course not hared, just to surprise the puppy with a "mouthfull" of hand - they will immediately try to spit out your hand. Shout NO BITING! while you do this. We would also hold her muzzle shut for a moment & look her right in the eye, saying "no biting" . she stopped. If you haven't gotten into puppy classes yet, by all means, do so. You will need to understand dog behavior and how to give corrections properly, especially with a sibe. These guys will challenge you every step of the way! I love my two to pieces!