If you add a new drake in the spring there is going to be trouble hormones are really starting up then. If you want to add another drake this time of year would be best on through winter. Make the new guy his own space right next to your 2 so they can meet and great with out fighting it may only take a few days but it might take longer. Every drake is different in personality. But hormones are waning now which hopefully means your new boy won’t be raped.