Here's an interesting post recently from the great dog trainer/author Patricia McConnell (if you haven't read he The Other End of the Leash, do!!).
She has some interesting comments and lots of wisdom in this -- a big question so many of us worry about.
And note the breed of the little puppy farm rescue girl she is writing about -- check the picture at the end of her post!
What do you think of her ideas on recall and off-lead readiness?