You can call the child's father and have the child picked up. You can file for custody and serve both mom and dad. Then prepare for all out war. Your grandchild is NOT being neglected or abused based on what you have said. Is this about your grandchild or punishing your daughter however? What did the ER state was wrong with the child?
Parents should remember 3 things: Love your kids more than you hate your ex; when you have children the relationship with the other parent is until death; your children determine what type of nursing home you end up in.
Nothing stated by me should be taken as giving you legal advice or forming an attorney/client relationship.
Attorney-GAL in Ohio.
I've removed the knife from my back, polished it, and will one day return it -- long after you think I have forgotten.