I ordered to female runners, one black (vinny) and one blue (ollie) from metzer farms back in march. Both were sexed, but we all know the sexing on a female isn't always exact. They are about 7 weeks old now. My duck Vinny has been quacking since she was 4 weeks old. IT's started as a little chirp but now it's a full blown quack. Ollie had yet to quack, just peeps. So we assumed that we just got unlucky and ended up with a male. Oh well right.....? Well today, i picked up ollie out of the tub and gave him to my finace David (ollie is HIS duckie) to put him back into his house. I grabbed Vinny, who is my duckie, out of the tub for a quick snuggle in a towel to dry off. While holding Vinny, who was being very quiet, in the bathroom... I heard a loud continuous quacking sound coming out of the office!!! It sounded exactly like Vinny. My other two full grown runners were in their pen in the studio, but they have deep quacks (and I know their quacks by ear. They do live in my house and i listen to them quack daily). the quack i heard was distinctly baby quacking that sounded like Vinny. I got so confused I pulled vinny up to my eyes to make sure it was her... I thought maybe i got confused and put Vinny back first. But no.... It was Ollie making that sound. Of course when we went to go look at Ollie he/she is peeping. I'm so CONFUSED!!!! Ollie hasn't made the sound since, but we are going to try again tomorrow after bath to see if ollie quacks again for Vinny. Since they are the same age and the same breed, shouldn't they start quacking around the same time? I mean it's a 3 week difference... Is Ollie still most likely a boy who just got loud for a second? Do boy ducks go through any sort of voice change that could sound like quacking?