The kid didn't even need stitches.
I don't blame the kid. He was just bein' a kid.
How old was the kid?
We went to the zoo plenty of times and we always knew we weren't allowed to climb up on the enclosures or try to touch the animals, except in the "petting zoo" part. So yeah, it probably wasn't the kid's fault, but obviously the parents had done a bad job of parenting beforehand. It wasn't just a case of "turn around and the kid's in the bear pit".