I can always remember the first two novellas in Four Past Midnight, but never the plots of the last two stories that well. I read them, but they didn't leave a huge impression apparently.
I have a feeling The Sun Dog was adapted as a short film, maybe a Dollar Baby. But I looked for it, but can't find it anywhere. Perhaps it was proposed, but never made.
Here's another thread about the last two stories from Four Past Midnight:
In any case, it hasn't been announced yet if there will be a second season of Creepshow, and which stories will be used. But reactions to the series have been mostly positive, so it seems likely to me they will do more. Too bad I can't get Shudder here, so I'm hoping for a blu-ray release.