Darn.. i was led to believe about a year was when they were then getting sexually active, and assumed young my drakelets were just mimicking dad (the males don't bother each other but dad mostly getting meaner with sister , and daughters some too). would it help if poster had a female at least for their boy?
No. not even close lol wish it were true! but you have to compare it to the ducks coming into lay, they do that as young as 4mths.. average 5-6mths so that is right when the male counterpart starts considering his options.
The OP could definitely benefit from more ducks, they do better with their own kind, chickens are okay but don't have the same likes and behaviours as ducks do, especially Muscovy, not to mention mating can result in death of a female chicken so best to remove and/or curb that.