We were training in a wildlife area last spring and using some drake Goldeneyes we had harvested. Not the best eating bird, but they make great training birds, the black and white show up amazingly well. My buddy and I both had hunting licenses and are therefore allowed to possess 24 ducks between us, possession goes beyond open season. Game Warden stopped by and checked us out, he really likes to watch dogs work, just asked were we got the birds, told him they were harvested this past season, and he was fine with that. Plus you could tell they had been frozen, but he did not handle them. Nor did he ask to see a license. Personally, I like duck meat so much that I eat everything I harvest, except for Goldeneyes, and I do not shoot Buffleheads.
I will buy pheasants to shoot live flyers from a pheasant farm and then clean them to eat. But I will not do that with farm raised ducks, since I cook duck meat rare to medium rare, not using farm raised ducks.