I have almost 2 week old mallards who are already developing tail feathers. I also have two 3 week old Mallard and Rouen who have just started getting tail feathers. I see pics of other little guys all who seem to be feathering out waaaaaay before my older ducklings. Is it normal for them to have such a difference in feathering out times? It's weird especially when my big galoot of a Rouen and older mallard seem to be less mature feathering-wise than my little 2 week olds. Also the older ones tail feathers so far just look like slightly feathery sticks. I've been trying to find pictures of different feathering out stages in ducklings, but haven't been successful. Should I add this to the list of stuff I am worrying about as a newbie??