Assuming this is a genuine question and you aren't being a smart-ass…. It's your fault. You did not train your dog to accept the presence of alpacas. And it's probably too late now. You also didn't keep your dog under supervision. It's also too late to punish her. read more
Based on the question, it doesn’t seem as if you were intentional and willfully intending the harm of another animal, but you need to understand that your actions or lack thereof in the aspects of training, monitoring, situational awareness, and management of your animal led to the alpaca being killed and the dog should not be punished for inadequate training. read more