Mine are two weeks old today... and were eating worms from yard within a few days... they had to be small ones though... hubby dug some large ones from garden and cut them in half for them and placed them in water and down they went...
they can eat anything the big ducks do. oh and if you wanna see something funny get about 20 small goldfish and put them in a clear bowl for them. you'll get a good laugh and the ducks think they are in heaven!