I have read that females ducks start making different noises early on, is this true? Both my 4 week old pekins are making a weird sound that sounds like a cross between quacking and chuffing. It's not real loud yet, but I have heard a couple of my 3 week old golden hybrids making a similiar sound, and they're supposed to be sex linked females. Am I getting my hopes up thinking that my pekins are girls? They came from TSC with no sexing, so I have been hoping. When should I expect a noise from the boys?