That's what we have done. Just let them get to know each other with supervision for awhile and then they've always started looking out for the smaller birds in "their flock ". We've only had one to two at a time. I don't know if that makes a difference or not. I also know that we've had owls...
Have you thought about or would you consider getting a goose? On two different occasions that I can recall over the years a goose has been good protection and watch dog for us with our chickens and ducks.
We have 2 mini donkeys, Cheech and Chong! They are the "hit" of every appearance they make. Dad trained them to drive and had a local Amish harness maker, make them each a harness. They are precious each in his own way. And neither one miss a chance at any prank they can think of. Keep an open...
I've been here for months, but not hereso I'll make it official. I've got a variety of poultry. And I find this site very informative and entertaining.