I missed a few practice sessions with Uma because of her pad injury, but she's back to normal now. I'd been working on her independent teeter performance ever since August, when I noticed that she would wait for me at pivot point. I went back to plexi-targetting, then removed the plexi and proofed her performance by varying my position. The one thing I still need work on is the strong stop when there is HUGE speed. She will miss the position (barely, but still) if I am way ahead of her and she's coming at the teeter with increased speed (off a tunnel). Here's what it looks like at this point. I like it.
Well, like you guys said in the comments to my previous post, it is not particularly productive to obsess over the nature vs nurture thing, but I honestly cannot help doing it. Especially, since I own two littermates, who are as different from each other as can be in temperament, I just find myself looking for these little suggestions of what's to come. And definitely I'm negative about this - I obsess about the behaviors which may possibly turn into something bad a lot more easily than about those which might turn into something good.
It also seems that I tend to forget certain experiences very easily. I almost panicked a couple of days ago when Eden spooked on hearing dogs barking at the agility place. I complained to everybody I met that I'd broken my puppy and was doing a lousy job. And then Wanda, Jinx's owner, reminded me how all three of our pups (Uma, Malcolm, Jinx) panicked when they heard an airplane flying high high above their heads when they were about 3 months old. And this stage passed, they surely wouldn't sppok at this now.