Silage

Silage
Animal Food.
Type	Item
Value	$0.20 $0.225 $0.25 $0.3125 $0.375 $0.4325 $0.5

Fermented grains that are highly desirable to Cow and Chicken. Putting crops (including Wheat and Corn) into a silo will turn them into silage over time. 1 Wheat or Corn will yield 10 silages.

Make sure that there is some space in your silo's inventory!