Once you're free-flying the bird, you may see there's a line where, if the bird goes beyond, it's more difficult to get her to return to the glove. In my experience it's actually more like 80 yards, but as a title for this section 100 sure sounds good. Do practice calling your bird from outside this boundary distance because if you're hunting jackrabbits, she will probably end up outside it very frequently. You might her two tidbits instead of one for coming over a long distance.