Oh well since it's kind of slow, I'll pontificate on a bit more of what I do with "Dog's with uh People," issue's! I would grief on Germanshepardfroum, often for saying ... "If I can do it, anyone can." And yeah it would go downhill from there.
With this dog to get him back to where he "was??" I don't know if I can help with that?? I can help get better him, and if his owner want's to get him back to where he was?? Well then yeah find a competent qualified "Behaviorist," that has "Eye's on the Dog," and work with them. And I say "Good luck," with that!
Dog's with flat out, straight out "Human Aggression," well you don't need to be a Rocket Scientist to figure that one out! It's a "no brainer!" Dog's that are Skittish, Nervous, Fearful are "Unpredictable??"
You don't know what they are going to do, when faced with people?? Maybe it will work out, maybe it won't, who knows?? And for the record a dog can take a treat, from a stranger and still bite the crap out of them! And no less than Michael Ellis and his endless supply of Mal's ... told that story, online .. to his credit.
But for the part as to why and how that can happen, is simple. For the most part, a dog with a fear of "people issue," or out aggression ... "won't take treat's from stranger's!" Straight, up flat out a dog with people issue's won't take treat's from stranger's!
But you have the "X," factor ... the dog focuses on the treat! Consumes the treat that some "Stranger Gave Him," he consumes it, and then look's up and there is some A-Hole in his face, petting him?? What the Hell and you have bite one!
I don't take that chance ... "My One Rule," is my dog my problem ... "No Civilian Involvement!" My Wl GSD did not like "People!" Period end of story! And I "respected," his choice! He does not have to like "anyone," he only had to be "Civil!" I respected his choice, he just had to be "Civil," and my "Job," was to keep people "Out of His Face!" And I was good at my job!
Rocky and I could go anywhere ... "He learned that he could trust me, and he learned what was expectable and what was not??" Uh ...proven! He understood I had his back, and he had my mine "apparently," as I was to learn later???
In ten year's there were only "two people," I would trust leaving him alone with! And my wife over rode me with one of them ... when I took a nap! '
But other than that when company came over ... he was with me, by feet in "Place!" House full of guest and his fine with that. Just don't ask to "Pet Him," and we were good!
But it did not really cuz Struddell was busy entertaining, everyone with her antic's! Now I did observe the most part our "female guest," were pretty cool to her antic's?? She would set quietly, next to them and wait for attention?? They would ignore her ... and she would say ... "well screw this I'll go back to the guy's!" And craziness and hilarity would ensue!
Dad was forgotten for those weekend's! She slept with company! Stru was a "true," people friendly dog! Rocky on the other hand ... could not wait for folk's "to just get out!"
And for the most part as far as I have seen?? If a dog "actually like people??" You don't need treat's! Stru would not take either cuz she did not care! Meeting people was the greatest, thing since the invention of Bake Bread!
My Rocky was the exact opposite but I worked with each of them. And yeah "Rocky," was a surprise to me?? But I worked with both and "excepted," who they were ... and it worked out fine in the long run!
So just saying ... "I can't help get him back to where he was??" And the "Climbing in your lap bit??" Is just so not good on so many level's! And I can state as a fact ... that if you sent him away to a "Competent Board Train," that would not happen! But right now ... you know of no alternatives??