1) no and yes. No, because GSDs do have a strong protective nature. Yes, bite work can be trained just as a martial art would be for humans.
2) Again depends on the motivation for the bite. Dogs bite for more than one reason.
3) Yes. See 1 and 2. No, see 1 and 2.
4) Bite work helps both the owner and dog. The key thing for both is control. If the dog and owner are trained in bite work that vastly increases the possibility that you will have control and the dog will listen even when it is at its highest drive state (whatever the motivation for the drive may be in the particular situation.) Depending on the lines and the individual dog, a GSD may bite regardless, so your having control is much much better than an owner who does not. Many owners think they have control over their dog because they obey basic obedience commands. The problem is the dog is not in a very high drive state so both dog and owner are totally unprepared and do not have control just when the situation demands it. Now if you are not present and a dog is just by itself in your yard, the control and assessment of the threat is up to the dog. A GSD properly trained in bite work may be more confident so their threshhold for biting may actually become higher. Which means they will be less likely to bite at a non-threat when alone. Also, proper protection dog training exposes dogs to different scenarios, both threatening and non-threatening. Again, the dog learns to have better discernment of either situation. Having said that dogs make mistakes just as people do, so do not put your dog in the situation where it is up to him to decide when to bite.
With regard to legal liabilities, please consult your lawyer.
Last edited by Ocean; 05-30-2013 at 07:57 AM.