This is the one that we are not sure what it is. Its down is yellow with some gray, its bill is dark gray and its feet are gray. I think the other ones are fawn and white Indian Runners but am not positive. They all were in a mixed bin and came from Estes Hatchery. You can see that the dark billed one seems to have a slightly different body shape. It usually doesn't stand quite as tall as the others. Swimming fun! You can see the dark billed one is wider. Could it still be a runner? They are 12 days old in these pictures.