This is not from personal experience, but I can say that any grain like corn, millet, wheat, barley, or sorghum work REALLY WELL when placed in shallow water or near water. There always seems to be several poachers arrested each year hunting over grain (baiting). They wouldn't be doing this if there wasn't an upside (if they don't get caught). This would be perfectly legal and a great way to attract waterfowl to your pond. You'll also get a healthy population of mourning doves.
