i have 4 cayuga drakes, 1 mallard drake, and 4 ducks.... they all live very happily together in one pen and get along fine, the only problem i've had is i had a blue swede in there with them they LOVED her, if ya get my meaning... all of the drakes, so i took her out to free range during the day with the calls and then she beds down in the call house at night, other than that .... no problems, i can't give my drakes away.... noone wants them and i refuse to dump them off at a lake, so as long as they get along, they will stay together