I had a little guy who was being so mean and always to one particular little girl so I kept him separate in a playpen in the play room with some toys so that he could not reach her to hurt her anymore. It took a couple of weeks but and he was upset to be removed from all the toys but he finally got it (mostly) Sometimes it made me feel bad for him but I didn't want to lose a client over it. Good luck. And for the record my day has been Yuk too.