I'm new to having ducks. I have 8 Muscovy ducklings that are 4 weeks old now. The last 2 weeks, 3 or 4 of them have out sized the rest. I am thinking I have 3 or 4 males. Is that how you know whether they are female or male, by the size as they are growing? ***EDITED*** Please disregard this post. I found the search option and saw this has been answered in the past. (I just don't know how to delete this) THANK YOU!!!!!