Very nice! I like all the detail you've used and the wolf analogy was great, giving them a way to talk about Dean's fears. Loved how Sam's scent reminded Dean of their dad and triggered such an emotional response. The first paragraph written in first person POV however was a bit jarring because it was only used in that paragraph. I've tried that sort of thing myself but my beta immediately said, "stick to one style". That aside, I enjoyed the read and look forward to more!