S.W.
My child goew to daycare and yes kids do get hit. However at our daycare if we see a child is constantly having a behavior (hitting, biting, pushing, ect.) We have a behavior guidance plan that we use to help prevent it from happening or at least minimize it and teach a more appropriate response. Also we have a three strike a day rule and then you are sent home. You could ask your daycare if they are doing anything to stop this. If they are unconcerned about this boys behavior i would pull my child. You wouldn't want to be hit all day when your at work. My three year old boy doesn't hit hardly ever so a 4 year old should certainly know better.