Thanks so much Jane. This was helpful. However, a few more specifics:
a. I can only give my dog a few hours of roaming in my room/yard under my supervision. Mostly, she is in the yard, unsupervised. In fact, as I mentioned there is no human interaction till either I come back or the dog walker comes- who comes in between to take her out and do basic commands training with her during the afternoon.
b. While I understand what you shared about dominance and the obedience training by everyone is now something we have done and it definitely makes sense to do that, now that you mention it. I just wanted to share that she is a very nervous dog, the word a trainer I met in the park where I often take her to exercise/train was 'shy' and advised me to 'give her confidence'. I must mention that the trainer was not her trainer but just interacted with her, by chance, while he was also there with his dogs. I would be grateful if I can get some tips for dealing with stress and fear/nervousness. Before the rehoming I was using a clicker and she responded really well. However, with the new owners she reportedly went berserk at the sound of the clicker. I have not sued it since her return, do you think it can/should be reintroduced? Also, in the reintroduction should I start from scratch in associating the sound and treat?
c. In one of the NILF articles you shared (thanks for sharing them) it said aggression can become a learned behavior. I am afraid that might happen because she is,also, a nervous dog who is now repeated the growling and snapping enough times to realise that with strangers/otherpeople it does work to get them to step back. My question is with work,would she be able to forget that?
d. Finally, just by means of sharing as you respond to the above she is a dog which is food compliant, if you will. She does modify behaviour for treats and also is totally disciplined when its meal times.