parenting 4 year old boys

What should a fitness center if a child of 4 hits other children in the gym daycare?
Procedure stages. How many warnings? Because parents feel that children should not even be in the nursery, but I think the physical fitness center should try to resolve the problem without having to kick anyone out. What do you think or suggest? Thanks
The gym has to rely on parents to report the behavior of parents and give parents with a warning of what will happen if the behavior does not change …. If the parent gives permission a form of discipline, while the worker must give a warning, then remove the child from others, making the institution itself. First of all to go to the mother.
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