It is unfortunate, but remember these were children who were chasing the ducks. I understand the anger, but that won't help. These children do not likely know any better. They need to be taught why you don't treat an animal as a toy. This is a great learning opportunity for them to see the consequences of their actions. Hopefully this duck can teach them to treat animals with respect, so others don't have to suffer like he did. Personally, I think there is no better way then having them help care and rehabilitate the duck back to health.