So i might be hatching some of my pekins eggs, and i'm going to keep some girls that hatch to add to my flock. i just want to know at what age should i be able to tell the difference between girls and boys? I know that hens quack and drakes whisper and that drakes have drake feathers when they get older but is there any other way to tell the sex earlier? i don't want to try vent sexing because i have heard it may not be accurate and could harm the ducks.