Oooh, thanks for the idea! We used to use a check cord on him when he was a bit younger, just to keep him from running off in general. I think I'll re-introduce it when we go in the field so he can learn his range-- and so I can, too.

Right now we're working on retrieving in the house (definitely his weakest skill, but he's learning) and drilling all his regular obedience work- heel (on and off lead) stay, down, sit, and coming when called.

I'm glad you mentioned the check cord for teaching him how to range out. That's really what I'm most confused about in the whole process- I've got a fishing pole, a little quail scent, and some wings, and when I was a kid I taught my terrier how to track, so that part I have covered (my feist is 100% reliable on 'stay', so I'm not worried about teaching him to hold steady to wing and shot; if I tell him to stay and toss a piece of meat across the floor, he waits until I tell him to go get it to scramble after it.) But it's teaching him to get out there and zigzag that has me confused. Thanks!