I do the same. I had this girl for a year (aged1-2) then they left for a year and then she came back to me in Sept (aged 3). She was fully trained when she returned to me. She was in preschool before coming back and I know they will not help a child in the bathroom at preschool as the requirement is child is trained before they start. I don't mind if she calls me if needed but didn't think it was necessary to run with her every time she goes because she is obviously not telling me.