I would hesitate to take the dog to a gun range. The dog needs to make the connection of birds and guns. Much easier if the dog ends up loving the sound of gunfire. Even at half a mile away, a gunshot can startle a dog. In my teen years, I took my first setter hunting. She wasn't introduced properly. We were hunting on the volcanos of Hawai'i when a gunshot firedfrom miles away. Too me it sounded very faint but the dogtucked it's tail between it's legs and jumped/ran 20 feet the other way. It took several pheasants to overcome her hesitation.

Get a .22, ahelper, and a two-way radio (cheap frs ones).Takeseveral clipped wingbirds. Let the dog play with a couple first. Then let the helper fire the .22 from far off. But make sure she's on a bird first. If she acts startled put it away. Do it again the next day.