How To Tell If Oats or Oatmeal Are Bad Mold. If you notice any, throw them out. … Smell. If the oats smell moldy or off in any way, discard them. Discoloration or other changes in appearance. If there’s something off in the way they look, assume they’re gone. Pantry pests. Consequently, Can oat bran … Lire la suite de How can you tell if oat bran has gone bad? More