I have known puppies to be very desirous of my contact, but haven't seen one actually get between me and the other dog and bark if I show them attention -- older bitches, the green monster, oh yes. But not littleun's like this one.
Usually my litters, I watch the little buggers fight and play and occasionally hump the others, but usually within minutes that pup is being humped by another. I usually cannot see a definitive dominant pup. There is often a pup that stays back and watches everything without getting involved in the ruckus, that pup usually turns out to be VERY intelligent, and somewhat independent. The pup that goes off on its own, is first out of the box, is halfway across the yard checking the weak point in my fence while the others are still wondering what that green stuff underfoot is. That pup is generally intelligent and independent -- which might be misdiagnosed as dominant, but is not.
There is the pup that spends 45 minutes and is still pulling against two other puppies for a bone. That pup usually is a bit of a challenge. Not necessarily dominant, just stubborn or drivey.
My first GSD at ten weeks old full blown attacked my neighbor's lab when she came down her line to investigate us. He WAS a domintent, aggressive, high drive, high energy, working line, crazy dog. I did not have another dog when he was 13 weeks old, but when I got Arwen, he was five or six years old, and he NEVER tried to come between she and I.
It will be interesting to see how this one grows up. I haven't ever heard that NILIF has ever hurt a dog. Usually, I let puppies be puppies, but getting a jump on training classes does seem like a pretty good idea.