I fed a bear with her dog while she was away.
How could you do that to the dog?
The dog had rabies and was annoying me around the house, and this is fair.
There is no reason to hurt a defenseless dog and you feeding her dog to a bear was not right. Apologize to her for the incident and get her a new dog.
I didn't like the dog much, I'm too young to own a dog.
The dog isn't for you, it's for her. You need to replace the dog you killed.