What would you do if you where in my shoes??

Okay. I posted previously about my daughters fear of a certain breed of dog.

Well. The dog in question belongs to her grandmother. Its a pit bull. THe thing has no training. Has bitten my daughter 3 times, once on the hand, on the arm and in the face. I had told them to keep the dog crated when she is visiting. But my daughter just told me they have been letting it out of the crate. IT comes right for her and after her growling at her, so they send the dog to its crate. I guess her 'poppa' wants to get a shock collar for it. I think they dont realize that just may make it not like my daughter. Would it see her as a threat still?
The first bite to the hand mydaughter was reaching to take a phone from her grandmother. The second bite was to the face as her grandmother was sitting her down after picking her up out of the tub. The last bite again she was handing the phone to her grandmother. I personally want the dog put down. A dog should not bite for any reason at all.