Has there been any progress on this? You made any headway?
And just a note - I'm sure you already know - but there have been a lot of cases of dogs being put down for attacking people - even when it was on the owner's property. I worked at a pound and I saw "aggressive" dogs put down that had bitten someone on their own property because despite that the courts thought the dog was a danger to others. I'd keep your GSDs out of it.