can you get the ball away from her without her being agressive towards you? even if she's in the middle of being agressive about it with other dogs? i know finn would get agressive with his bone and i just took it out of his mouth and wouldn't let him have it. it seemed to work, but, i wouldn't do it if you think you may be injured. or maybe even don't take the ball if there are going to be other dogs around. is she agressive with all toys or just certain ones? maybe you could take ones with you that she's not agressive with. i'm curious to see others advice, it's part of why i replied. *bump*