So w'ere (sort of) settled in now, and trying to get everyone adjusted. My guys can tell there's something in the works, but they aren't sure what. They've only briefly seen Harley, but they don't need to meet for a bit yet.
Things are a little more complicated than they first seemed. The only way I can describe Harley right now is shell-shocked. When we first pulled in the driveway, I took him for a short walk, and he did go pee but remained at the end of the leash the entire time - not pulling, but as far from me as physically possible. His eyes were like dinner plates and he was throwing every stress signal I know of around. He was put on Clomicalm three weeks ago by their previous vet, but he hasn't been taking it long enough to have any effect, so I am going to continue with its use.
We walked into the house together and he took immediate refuge under the table in the corner of the kitchen. I let him stay there a while to calm down a bit, but he would not take any treats at all - steak, cheese, nothing. I eventually had to guide him out, which he came willingly, but then looked for another hiding area. I set up the spare bedroom for him. It contain a double-size box spring with a couple comforters and his own beds on it, his toys, and some fresh water. It is separated by a baby gate and when not supervised the full door is shut. I sat with him for a while, and spent about 15 minutes removing his leash. Every time I moved slightly he would stop panting, become close-mouthed, and start lip-licking quickly, eyes widening. So I had to move really slowly. He then crawled under the box spring and stayed there.
I had a vet appointment, so I closed him in safely and left him a few bits of cooked steak on the floor. They were still there when I returned 1.5 hours later. I did, however, manage to coax him out, leash him, and take him into the office with me, where he currently is. There is a baby gate in the door, and there is an expen set up a few feet from that with a blanket on it currently to obstruct views. I will work to slowly remove the barrier, but for now it is for the best.
He still does not want me moving anywhere near him, but he is watching me. If I sit down on the floor too closely, he will simply move inward on himself and shiver so hard he rattles the floor. He is acting interested in the other dogs, though, so in a day or so I might let him meet Zipper and see how that goes. But I'm giving him two days of *just* me and my partner with him, and no stress (or as little as possible).
I have spoken to my own vet, will be speaking with his vet, and will also be speaking with some professionals that I respect to get some other input locally. Right now it's just going to be a matter of seeing what happens in the coming days/weeks. I will not be making any decisions lightly, and I'm not in any rush to make any decisions, but I do have to be realistic as well, and I will make the decision that I feel is the right one, keeping in mind his quality of life, and the safety of everyone involved.