I am a first timer with ducks and chickens. When I bought my flock I was told I had all female chickens but the ducks were not sexed. I did not know what kind of ducks they were. I was told they are chocolate runners. I got them from my local tractor supply store May 2nd. How can I tell if they are male or female? They all sound they same loud and I don't see any tail fethers turning up yet.