On the other hand, yesterday I invited my friend Valerie to call Bella to take a walk in the same way that I do, just to see what would happen. I have some concerns that if Bella is dependent only on me, and I become unavailable for some reason, she would be lost. When Valerie called to Bella, Bella went to her, as eager for her walk as usual, despite the change of human. This was when I was sitting in the living room with two other people whom Bella easily could have seen had she looked up. Bella walked with Valerie, and did so without a tucked tail. But she must have been somewhat tense because she did not do any business.
In many ways, I have the feeling that Bella just doesn't know how to respond. She still doesn't wag her tail. Just now, when we were walking back to my house, we passed within inches of a dead squirrel (no doubt one of the ones with the inadvisable escape route) and Bella didn't even sniff, let alone glance.
I think about my friend's suggestion that Bella needs to form new neural pathways. Bella was able to alter her walk (with my encouragement in the form of running) so that we now use the driveway, and not the perimeter of the yard, as we approach my house. It only took a couple of days to establish this new, dry footed pattern. Would it be helpful for me to start guiding her on new walks?