Tell sis to BLEACH EVERYTHING before she gets another one. I don't think I'd let the neighbor's kids play with it either. Take a sprayer or attachment for the waterhose for fertilizer and spray the whole yard, bushes, etc. Do the neighbor's yard/pen, too if they'll let her. There's also something called Parvocide or something like that I think can be used in the house/car, etc where the bleach can't be used.