Each rain event contributes to additional deterioration of grain quality. While the objective is to harvest as quickly as possible, if the grain is going to be stored for later use as feed (or ethanol, etc), please DO NOT harvest at high moisture content. Already moldy grain will continue moldy growth unless the moisture is below 12%. To arrest growth, harvest below 12% and keep air flowing in the bins.
Moisture sensors in the combine are unlikely to be accurate for sprout damaged grain!