I don't think you're doing a thing wrong at all. Keep running the drags and start working them some some on a live shoat.
They're just pups, they aren't going to wonder to far from their "safe spot" which is around you.
I disagree and will say pups (at least speaking about my own) that are purposely bred with a lot of go and independance will get gone from the first time they hit the ground. Then again, perhaps it's because I don't allow myself to be their "safe spot". People often times without even realizing will "train" a pup to stay close by their attempt of socialization (which in my opinion is NOT needed to bond).
