Indoors, if the tug (we're using the black sheepskin tug mostly at the moment, as it has a much wider bite area) comes out, she is instantly 'on'. She wants it, and she will leap for it, bite and hold it, and retrieve it.
But outdoors, there's so much more exciting stuff - balls to play with, birds to chase, smells to explore. So, we've been working on it on and off, and this is where we are now.
Her tug drive is really coming on in leaps and bounds, and it's awesome. Tomorrow, I'm going to bring Jess to the field and have her leashed up (with something to play with, obviously) to act as a distraction, and we'll work from there.