unless you are raising the drakes for meat, i would sell the drakes or separate all of them. i hope i could help. remember the sooner the better...At what age are the ducks sexually mature? I ended up with 8 drakes and only two little hens when I bought my Indian runner ducks. I'm going to have to get ride of the girls or most of the boys as I don't want the girls to deal with that all the time. They were born April 29th so they are now 3 months, 16 days old. That means that the girls might start laying soon? I thought I would be fine until next spring but it sounds like I need to separate or sell now, right?