Hi! I have four 7 1/2 week old ducklings. Recently they all got their quacks in and I was able to voice sex three as male and one as female. This was a bummer as we wanted at least two females and one male (we got the four knowing that we may need to sale a few extra drakes). I just didn't imagine that we would be unlucky enough to get almost all drakes. Fast forward to today. Browsing some local classifieds online and see that someone close by is selling a 4 month old hen. I've hardly seen any grown hens for sale so it's now or never if I want to get at least two females, with little hassle. It's a 4 month old Cayuga. I bring her home perfectly aware that I may need to pen her away from the ducklings but I want to see if she does well with them so I release her into their run . . . what happened next was a complete shock! One of the ducklings is a cayuga as well. As soon as she came out this duck who has never shown ANY aggression runs up to the new comer and bites her in the back of the neck. He holds on and won't let go! She nips at him but he does it over and over and over. She finally submits and sits down and he then kinda looks at her like now what am I supposed to do? And walks off. I watch this cycle repeat it's self over the course of two hours two more times. Once the older duck goes after him at first but he gets the better of her. What is going on?! The other ducklings seem to care less. It's literally just the two cayugas. The attack duckling I had yet to positively 100% identify sex as it's really quiet but I'm pretty sure it's a male. Is this mating behavior? Dominance display? Why do the other ducklings care less? I though I was going to have to pen the big hen up to protect the ducklings but it looks like it might be the other way around??? Nature is weird!