After 8 to 12 weeks of age, geese and ducks will eat very limited supplemental grain. Most breeders feed a mixture of about 40 percent corn and 60 percent oats until breeding season. Breeding waterfowl require only a 15-percent protein diet. Allow 6 linear inches of feeder space per bird and place feeders away from waterers. Provide plenty of fresh water at all times.
Water is essential for healthy growth.
To keep the pen dry, place the lip of the waterer at the birds' back height. Adult birds require a waterer deep enough to get their head under water beyond their eyes. To ensure successful mating, especially in larger breeds, make water available for swimming. An old water heater tank cut in half works well. Many unique markets exist.