I haven't named them yet but I have 5 original ducks, 3 younger ducks (black cayugas), and 2 new ducks that we introduced to the other ducks for the first time today. To my surprise, the new ducks immediately attacked the established flock. I figured the flock would try to put the new ducks in their place but I didn't expect the new ducks to be the aggressors. I let them fight it out for about 10 minutes and then stepped in and put the 2 new ducks back in their cage. We'll see how it goes tomorrow.