Anything is worth a try just remember when you feed your ducklings or chicks anything other than their starter they need grit to process their food.I've heard that some of the really small ones catch up at a certain age. A lot of people say to feed them scrambled eggs, mealworms, and extra vitamins. I scrambled some eggs and put it in their food. I saw the little one perching on the baby cake, she wasn't eating it though.