I have four ducks, a Pekin (that I'm pretty sure is female as she is quacking) a Crested, a Mallard, and a Runner. They were all raised together (with the Runner and Mallard being a couple weeks younger) and are starting to molt into what I'm assuming is their adult feathers. The three that are not quacking have the deeper raspy sound that a Drake makes. I cant get anymore females unless I exchange out some males. Is that my only option? I don't want them to hurt my only female. It will just suck as these are beloved pets that I raised on my own. (My first ever ducks) I know sometimes there can be females in disguise. Do I just wait for a Drake feather to determine sex of the other three or should I get some males out of there ASAP?