Mine are almost 6 weeks old but no quacks yet so I don't know what to think. I am hoping for at least 2 girls but I know my luck. If the eggs came from my one Mallard duck she usually throws off all boys. I am going to catch them again at 8 weeks old and listen to them. They are skittish of me but come within 6 feet for treats. They do go back in the pen. I spread my arms and make the sound of a Hawk all the while telling them to go in the pen. If it wasn't for the privacy fence between me and the neighbors I am sure I would be committed by now, lol.