In my book for geese it recommends to put the corn for the geese into a container with water on top, so crows etc don't get to it. Just one query though - how deep under water can the corn be?
Mine now get a bit of wheat in the morning too (also in the evening but that is in a bowl inside their house), but of course the crows have cottoned on... so their water bucket is an old round lick bucket (one of the intermediate size ones, maybe 30cms deep). Would some corn in the bottom of that be too deep for them?
What do others do? Still fairly new to geese...