i would muzzel her and put her on a leash and keep her right next to u and let the other dogs come to u when she acts up a quick command on no should work but might take a wile and when feeding muzzel her and let the other dogs eat right in front of her wile she is on a leash and when she acts up correct her this is only my opion also ask peter c he might have better advise on this subject as i dont have problems with our dogs being possive