I have had my Call Drakes with my other Drakes and hens since day one when I got them with no fights. I did have a problem when I had 4 Call Drakes as they like to mate a lot and I had 3 on top of my small Mallard Hen so I rehomed two of the drakes. I now have another drake that was supposed to be a Runner Mallard Drake but since maturing he no longer has the stance of a Runner. He is not exceptionally big and I don't expect him to hurt the Calls in the spring. I had my Calls with a big Muscovy Drake and a big Mallard Drake, a Khaki Campbell Drake too and all was well. The drakes all got rehomed because they were too hard on the Hens. Good luck with your Calls.I'm thinking of getting calls but they're not sexed so not sure cause I have Pekin drakes, a Pekin hen and the rest Swedish hens. I'm concerned if I end up with drake calls the boys could hurt them but maybe I could put with the girls cause they'd be significantly smaller? If I got girls I could put them with the other ladies but would have to keep them separate from the drakes when letting out (my drakes and hens are separated thru the night)