So my two rescue babies are growing up quickly. One has always been noticeably larger than the other, but now that they are nearing full size, I'm beginning to think that the larger one is a Rouen, or at least part Rouen. Her body shape is very different from the mallards I've had (and I'm only saying "her" as an educated guess so far, lol, partially because little duck is showing a tinge of green on his head and she isn't). The little one can fly small distances now, but I haven't seen the bigger one even try. Please give me your opinions.