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MB3 109b: Spoiled Meat, Raw or Salted Fish and Chamber Pots or Urinals on Shabbos (308:31-35)
Spoiled meat isn't muktzah since it's fit for dogs. Raw fish that is fit for a dog but which you want to eat cooked later on is muktzah. Muktzah status of unproven amulets.
גרף של רעי: Moving filthy items such as a chamber pot (מוקצה מחמת מיאוס) on Shabbos. What if it's in a place that won't be used until after Shabbos?