That a nice looking pooch you have there and dont give in with her,ive had young dogs eat them/do the wall of death around the field/ run 3 fields away with them and leave them/bury them in the ground and god knows what else,just persevere and dont give in and deffinetly dont loose your rag with the pup,she is still learning,just keep her at it as often as you can and im sure she will do you proud when she matures.