When should I let my hatched gosling swim? I thought I read somewhere that you should wait untill they are about 2 months old and have all their feathers and that if they are hatched by their mothers her oils rub off on them and protect them in the water while they still have their down. Without those oils they risk drowning. Same for Ducks. I've read where some folks here on BYC are letting 2 day old ducklings swim. This is my first Gosling and I have a batch of Ducks due to hatch Wed. and I want to make sure I do the right thing.