Hey everyone, so i got 2 ducklings from tractor supply the other day. I had no idea that rouen ducks looked just like mallard till now, I don't know what breed my ducklings are they where in the mixed breed and sex bin. I thought they where mallard but they might be rouen. Could some one help me identify them, i'm hoping they are mallards. I do know rouens have 2 lines on their face when they get older. One other question can you tell the sex by the quack? One duckling has a quiet and dull quack (boy?) the other one is loud and like a chicks (girl?).