S6·E8 All Dogs Go to Heaven

Episode recap

Task: Write a 280-380 word episode recap for Supernatural S6E8 (All Dogs Go to Heaven).
Constraints:
Use ONLY verifiable facts from the provided SYNOPSIS and SOURCES.
Do not invent/guess titles, names, dates, counts, awards, ratings, etc.
If a detail is not in the material, omit it.
Write original, neutral, encyclopedic prose in plain text.
No markdown, no asterisks, no headings, no bullet points.
Word count target: 280-380 words.
Synopsis: Dean and Sam investigate what seems to be a werewolf killing but turns out to be a skinwalker posing as a family dog who is taking revenge on his owner's enemies.
Source [1]: Series title Supernatural (2005). Genre: Drama, Mystery, Sci-Fi & Fantasy. Tagline: Saving people, hunting things, the family business.
Source [2]: Created by Eric Kripke. Cast: Jared Padalecki, Jensen Ackles, Jim Beaver, Misha Collins. Premise: Two brothers follow their father's footsteps as hunters, fighting evil supernatural beings like monsters, demons, and gods.
Source [3]: American dark fantasy series. Created by Eric Kripke. Broadcast on The WB and later The CW for 15 seasons (Sept 13, 2005, to Nov 19, 2020). Sam (Jared Padalecki) and Dean (Jensen Ackles) hunt demons.
Source [4]: Sam and Dean Winchester lost their mother to a demonic force. Their father raised them as soldiers to kill paranormal evil.
Source [5]: Spanish Wikipedia entry (not much new info).
Episode Title: All Dogs Go to Heaven (S6E8).
Characters: Sam Winchester (Jared Padalecki), Dean Winchester (Jensen Ackles).
Plot: They investigate a killing that looks like a werewolf. It is actually a skinwalker. The skinwalker is posing as a family dog. The skinwalker is taking revenge on the owner's enemies.
The synopsis is extremely short: "Dean and Sam investigate what seems to be a werewolf killing but turns out to be a skinwalker posing as a family dog who is taking revenge on his owner’s enemies."
The sources provide context about the series (created by Eric Kripke, stars Jared Padalecki and Jensen Ackles, involves hunting supernatural beings).
Problem: The synopsis is only about 35 words. The target word count is 280-380 words.
Constraint Check: "If the synopsis is sparse, stay concise rather than guessing." and