Ah Ha! The reason I don't (but desperately ) want a BC..Waaay too smart for me! Love them to bits!
How thrilling that Tinny's changed so dramatically in such a short time. Not to take her from the limelight, but I saw a huge difference in my Logan in one week too. Blame it on lots of love, play and attention. I really had to laugh when you said typical bitch. I had never had experience with a female, but I can see by Logan's reaction to other dogs, she wants to be "boss" (good girl LOL). Even with the back fence confrontations with 3 female Rotties, she never backs down, pees in front of them, shovels it at them, and then turns her head as if to say "humpf". She's not the boss of me (yet) but is a wee tad spolied.
I hope things work out with her and El. I guess it's like bringing a new sibling into the house. I'm sure they'll find their pack order and accept it. I hope, hope, hope you keep her. She sounds awesome!