In the same boat as you, as of now. Yesterday turned out to be a not a nice day. Lilly attacked my husband, out of the blue. She had done this one other time, but not with the intensity that she did yesterday. Husband's arm is very sore. Not slapping a muzzle on her, but I am with a very heavy heart going to take her back to the shelter.
Can't have this. Sorry, I have been working with her non-stop 24/7 and so has my husband, so that's what is really odd. Just like your Keene, all of sudden something snaps and Lilly will not come near us, and will run (we watched her for 5 minutes) forget everything we taught her as she would not listen. And then the attacks from behind.
I started this ventured committed, but this is something way over our ability. And the liability of taking her out and trying to social her? I would never know when she would explode. If something would happen, I could never forgive myself. It's baffling and heartbreaking at the same time. But I didn't sign up for this.
KAZ