SJS, this is true, they are too overburdened to just take kids away from parents, and work too hard to reunite families than rip them apart. So if you got to the point that you had to call them in, don’t think too hard about it, do what is best for the children. Some parents need monitoring.
In addition, I wouldn’t go to the Rav, I would call the grandparents and let them know before the Rav. In this day and time, most Rabbonim do not get “involved”.