Most dogs who understand the field delivery will go to heel w/ a simple left hand signal or verbal Heel. Put her back on a long line in your yard or at the park. Tell her to Stay and toss a short bumper (she'll be less inclined to be all amped up if it's short). Send her, and when she picks up, immediately tell her to HEEL and w/ your left arm, signal her to Heel too. Help her to "remember" where she should be going if she has "forgotten". If she's been trained, she will continue to hold the bumper and sit at Heel and wait for you to take the bumper. End of issue... Everything needs to be w/ control in mind initially until she gets the hint that YOU are in control of the game (ie, no more throws if she's obnoxious until she has remembered her manners). You can then proceed on w/ your play once she shows you she can play by your rules.