Thank you very much for taking the time to type it all, lack of concise-ness (concision?) appreciated! Its especially good to hear how it played out given she was so distraught at first and to know that she thrived as an only dog. I really am so uncertain, I can absolutely see the benefits - I could continue to give her all the attention and she often needs 100% of it out and about at the moment.
From a selfish point of view being the only living thing she interacts with most days, apart form OH when home, is trying at times though. Even if she has learned there are no-play times I'd love there to be another source of interest!
For her sake, if she were older I would be less hesitant about being a one dog household. But its a vulnerable age even without rubbish early life, slap in the 2nd fear period, pah. We've gone from lunging and barking to being fairly outgoing and resilient in a short space of time, but it feels like a fine line, especially with other dogs.
Partly I feel this could be frustration, she wants to meet, is unsure, it all becomes a bit intense if on lead... I can work on look-at-me and other ways to manage this, but if isolation is a factor I can't imagine she will become less interested in other dogs, at least for some time. I think she would simply like more companionship, not necessarily play (though she loves to if the opportunity arises) but just to be around other dogs doing doggy things.
A friend brought her complete-stranger dog and within minutes they were all happily asleep on the floor! Another couple of friends visit from time to time and the dogs are so happy just laying around chomping on chews. There is a sense of deeper relaxation and contentment.
AU just doesn't engage at all, he bumbles past in a short-sighted slight-dementia kind of way without even doggy acknowledgement for the most part, which is absolutely his prerogative. So even now she is socially isolated.
Off course it would be really hard finding a dog that was compatible with her and our needs. I'd day care nearby friends dogs but they have quirks that wouldn't be helpful. I'd probably have more luck looking for a pink unicorn for her to ride around on.
Sigh.
(getting less and less concise but it helps to vent and I know people will have helpful input and it will all become clearer)