In the future, I would suggest posting your own thread. This thread is over 5 years old and you will unlikely get a response from the people on it.I've purchased 4 ducks pekin . I believe 3 are male and one is a female. Can they all be tougher without hurting the female ? Or should I separate them?
To answer your question, yes, they will need to be separated. The female will get overmated. You will want to get her a female friend to keep her company when they are separated. Another option if you are not interested in eggs, is to rehome the female and have an all drake flock.