Z’s attitude to B has been, from Day One, an appropriately regal, “You are invisible to me.” This is infinitely superior to her attitude toward M, which was a wary, “You might be dangerous. Do I need to defend my person from you?”
The latter led her into some very painful behavior. Painful to both of us — breaking up dog fights is not fun and has generally involved damage to my person, except for the one time where I scooped Zelda up and threw her into the pool. I read something about Jack Russell terriers once that said you should never own two of them, because if they fight, they will fight to the death — they are incapable of giving up. M had every advantage over Z but when Z decided she needed to fight, she would not let go, and M, quite sensibly, defended herself. Anyway, I think that book was probably silly — plenty of people own two JRTs without trouble, but Z has a stubbornness and a focus that is innate. She would have been good at catching rats, I suspect. Put her on the job and away she goes.
Her job, however, at least as she sees it, is me, the care and keeping of. Her focus is on reading my mind, delivering her interpretation of my wishes, keeping me safe. B has just been a peripheral creature, innocuous, not threatening, not interesting. Lately, however, I’ve been leaving the house a lot more often than I used to, and leaving the two of them home alone. Gradually, slowly, tentatively… well, you can see the photo. R called them Yin and Yang. I call them adorable.