Unlock the Silo by reaching Farming Level 1
Gather 100 stone
Gather 10 clay
Gather 5 copper bars
Get 100g
Go to Robin’s Carpenter Shop
Choose the Silo from the build menu
Place the Silo on your farm
Wait for Robin to finish construction
Use the Silo to store hay from cut grass with a scythe
Collect hay from the Silo to feed animals in the Barn or Coop