Hi all! Looking for some opinions. I have one specific female runner duck that is constantly chasing, biting at, and pushing out of the flock a younger male runner. This just started happening today. Prior to, she used to always be by his side, and me and my husband used to joke they were dating. Everything I've tried to look up, has always been males aggressive towards females, but this is the other way around. We have other males, that she doesn't give any attention to. I am wondering why she may be doing this, and how to proceed? They all share the same house and run at night; and like I mentioned, she only started this today and they have been best buds previously to this.