The dog needs to sent to a Jindo rescue to see if they can tame him. I was bitten by a pitt bull several times & he left welts & 2 quater sized bruses & there was no way, I was gonna let the shelter kill the dog, I was going to sudjest a rescue, after I cleaned up, but when I went to tell him this, he was already on the phone calling a rescue, I was sooo happy, because it wasn't the dogs fault I pissed him off, I was doing my job by trying to train him not to jump & to sit, stay, come & walk on a leash. The trainings not what pissed him off, it was that I had other dogs to train as well & when I was finished working with him, he knew I was going to go see another dog, so he would bite me & hold on, he was not a mean dog, he just wanted more love that I couldn't give to him.
But on the bright side, the rescue too him, & I helped 2 other dogs find great homes & I traine a black lab to stop jumping & bitting & I trained a Walker hound to walk without pulling.
I did all this in 2 weeks or 41 hours, I would have stayed longer but that shelter was too far from my home, its an hours drive.
but I loved the experience & the shelter wants me back, but I know I wont be able to. I might try to find a shelter out here in Ottawa that I can go to, to just train dogs