I'm not a professional, however I have raised numerous of each sex together at different times and haven't had any issues until they reach about 18-20 weeks
Any info will be helpful; looking to add ducks to my flock. They will be free range with about an acre pond. I've read that geese are fairly decent protectors. What breeds would be ideal to start with looking to have around 10-12 ducks and 2-3 geese.