(Strip Number 188, Original Publication Date, 29 October 1981)
Panel 1: We start off with Farley, the living dust mop SNIFF-WHUFF-SNUFF-SNIFFFing underneath a chair next to a table. On said table is a jack-o-lantern.
Panel 2: He then SNIFF-SNERF-SNUFFFs the seat of the chair.
Panel 3: He starts to SNIFF-SNIFF-SNUFF the jack-o-lantern....
Panel 4: ...only to YIPE in horror because of how hideous it is.
Summary: The problem, of course, is that a real dog isn't going to react to a jack-o-lantern remotely like that, no matter what Lynn's notes might say. The thing is that I visualize a talking Great Dane with a speech impediment showing up the Johnston compound and yelling "RITCH!! ROU ROLE RY RIT!!"
ETA: Lynn's notes say that I'm right to (Scooby) Doo so.