Hi, I have my first runner ducks, they were 5 weeks old yesterday -should I be able to tell if they are male or female by now? I can hear the difference in quacks on recording on youtube, but when I listen to my own ducks the mixture of quacks and cheeps makes it hard to compare them to each other, perhaps they are all boys and that's why I can't hear much of a difference! Any tips, by what age do people fins they can clearly tell? I'm also curious if anyone has noticed a difference in temperament between young males and females -I have 2 very docile and 2 very skittish ducks. thanks a lot!