Here is my situation. I am new to ducks. I we did a lot of research. I have 3 Khaki Campbell ducks. They are 6 weeks old. I am hearing a noticeably different quack in one duck and the other two are growing in a band of lighter colors on their wings. I will attach picture. The duck with the QUACK also seems a tiny bit smaller than the other two. We are very worried that we have 2 drakes and 1 duck. Is it too early to be worried? I have also read that at 2 months they can change again and to not worry at 6 weeks. They are our pets and we wanted eggs. I guess I'm asking how the future will be? I also have a friend who is trying to rehome a 3 year old female mallard. If I tried to fix this situation with making two pairs, would the mallard fit in? Ugh... any help would be so appreciated!