Young duckings should have watery mash - use chick starter without antibiotics. They are too young for peas and chopped fruit/veggies just yet. They need constant access to water deep enough to submerge and clean their bills, but not so big as to allow them to swim around until they have their feathers in and have some protection against getting chilled. Mine would sit in their water bowl with about 1/2" water in it. They barely fit but loved it. They also had a warming light above their box with enough room to sit several inches away from it if they were too warm. If you mash some bugs, they love the extra protein. Gross but anything for the children.