I`ve hatched a few geese in incubators,but the % success rate is very poor.You need to turn them morning and night,ensure the temperature and humidity is right etc.I hatched 2 out of 12 last time.You`re better off buying day olds and keeping them under a heat lamp for a month,they`ll be fine then.I`ve never kept ducks so can`t tell what their eggs are like to hatch.Have a look at "Cyril Bason" website,they`re not expensive and also deliver.