Hi
I think it is hard on the child when the mom drops in and leaves. But as a parent it takes time to develop a bond with the provider.
When you say "open door policy" thats what it means...drop in any time except nap time.
Once things settle in and the child starts loving the provider,it is no longer an issue.
I think providers understand that it is hard for parents to leave the children with anyone in the beginning.
Most providers are mothers themselves.Let us not forget that many of them chose to stay home to also take care of their children so that they do not have to leave them with someone else.