The problem is stephan, the majority of people will read the original post and respond to that and not all will read through 4 or 5 pages to see your question. If you start your own thread, everyone will see it.
Regarding your dog - sounds like either some fear aggression or lack of obedience, (or both). At the very least, a serious lack of obedience. Instead of telling him "no" - have you tried giving him a down/stay command? Keep him on lead so you can enforce it.
It doesn't sound like you're currently taking him to any of the clubs that might be in your area or any kind of training? Just because he was trained in another language doesn't mean you can't train him things in the language of your choice. There's no reason you had to wait to discover the german "out" command. I would've just taught him "out" in whatever word I wanted. I would try a down/stay command and definitely a leash. Do NOT let him put people hands and arms in his mouth - EVER! Totally unacceptable, and really bad that you're making an excuse for him. He does not think they are a decoy and it doesn't matter that he's "only" mouthing them. I wouldn't come back to your house either if you were my friend. If you can't control him right now, then CONTAIN him. Either in a crate, bedroom, backyard, etc.
And seek out a qualified trainer experienced in schutzhund. This dog may not have had the nerve for it or may have been trained improperly. But chances are, this is handler (you) error in controlling him and enforcing obedience.
Last edited by Rerun; 05-16-2011 at 10:50 AM.