Look, I'm sorry. Who am I to judge?I have no idea what your expressions or tone is like, so I should probably calm down lol.
I've had Mallards and Rouens, and there is a difference. Mallards often have that faded stripe, so there's a 90% chance it is a Mallard.
Lol don't worry, I need to calm down a little too. I did some editing. No hard feelings
Good feed advice, by the way. Glad you caught that, I've seen some unfortunate things come of ducklings being fed the wrong food.
But I've always been taught that Rouen's eye stripes are solid.