I do not believe that was a joke. Not by the way that child was screaming. I cannot believe that it took all those people that long to get that dog off of that child. I would also have NOT let that owner walk away. A dog that attacked one of my babies like that?
Reminds me of a call my brother once told me about when he was LE for the city of Kent. Three family rotts had been out with the little two year old girl in the back field. They killed her, ripped her little body apart, and wouldn't allow the parents to come near. They did not own a gun and called the police. My brother and his partner shot all three.
This little child was lucky.