I live on 2 acres next to cow pastures on 2 sides. I am considering buying wildflower seed mixes that contain Lupines, but apparently they all have some toxicity. Would they be likely to invade my neighbors' pastures? Is the toxicity a plus with rabbits in my yard that ate my bean plants last year? Would they discourage the rabbits if I interplanted Lupines with the beans? Another plant I am considering is Tephrosia, another legume with toxicity.