Try taking some bumpers and some pigeons along, and work on training the dog. If the dog is really well trained, then take a skeet thrower and some skeet loads and get in a box or two on clays...
Ifyou're a good enough hunter to say that both 1)the dog is well trained, and 2)the hunteris well trained, then you're probably a guide anyway and have much better places to hunt than the rest of us and probably don't get skunked as often as the rest of us!
I always keep a couple duck wings in my freezer after the end of each seasonto train the dog with, but I don't think I'd want the game warden to find them in my truck on a day when I had a goose spread out and didn't bag any birds, just easier not to provoke any questions. Probably better to use plain bumpers, fake duck scent, or maybe just a few flight feathers for the scent...