Being attacked by and then killing an animal

It was the weirdest dream I've had in a while. I dreams about killing someone. There was a small animal, I'm pretty sure my brain was creating a wolverine, sneaking around my house and attacking me. Always biting my right arm. I would always catch it out of the corner of my eye before he jumped me. The first confrontation led to me holding his neck and second-guessing killing him. I let him go, and he came at me again shortly after. Wound up at the same impasse and I broke his neck, and had to clean up his post-mortem waste. That's where it ended.