I guess I just reply to myself to ask my question. I have Pekin ducks, Call ducks and Chocolate Indian Runners. Right now they are free to swim on the pond and go where they want to. My husband will be separating the Call Ducks and Indian Runners sometime at the end of January to breed. I was told they won't breed until February but they are breeding now. And the part I am most concerned about is the Call Duck is breeding with the Indian Runners. I hate to even look because I get upset that this is happening. My husband works and by the time he gets home he doesn't have time to work outside. I keep telling him he has got to fix the pen where they all can be separated and have nest. We will probably keep the Peking ducks out only because we don't have enough room and there is only one drake and rest are hens. Sorry to be so long but I just want to know if crossbreeding will cause any problems. Hopefully we can get the Call Ducks and Runners in their own pen.