Three ducks have hatched and are in the brooder and we're waiting for the other two to finish hatching. I'm so excited but now I can't help thinking I'm doing it wrong. All I could find around me was purina chick starter/grower - unmedicated. Do I need to add brewer's yeast for niacin? Do they need vit/min/probiotic additive for the water? When will they drink and eat? If they don't figure it out within a certain time frame - then what? Thanks for helping with my newbie questions.