Why do my 3 female pekins mount each other? They do it so much that they're balding behin heir heads... they won't allow the muscovy drake any action

[Chocorobo12]

Unless he chases them into a corner then they'll have no choice but to submit yet they will still try to squirm free from underneath him... should I separate my females... since they're constantly mounting each other? For context I've had my pekins from when they're only a couple months old they are a little over a year old now... my muscovy drake I just got recently I think two months ago. What I'm asking is should I let them continue this behavior or will they hurt themselves if I don't separate them. Please if you have any experience on this let me know thank you

 

[ruthhope]

Is your muscovy drake fully grown? If he is, he will be very much heavier than your pekins. That may be why they don't want to know the muscovy.
Female ducks are influenced by their hormones just as much as drakes are. My son has one pekin female that mounts the other one -- and the other has marks on the neck feathers from it. It could be domination behavior. My son's female pekins remain friends

 

[HollowOfWisps]

Ducks are very sexual creatures. Female ducks will quite often mount other females even with a male around, but will even more so if they're not getting their fill from an actively mating Drake. Sometimes it can also be part of sorting out the pecking order, but more often than not they're just happy to get it in with each other. Since they don't have hands they grab the back of the neck which is not them being malicious by any means it's just the only place they can hold on. When they are finished ducks fall off while still holding on and that's when the feathers tend to get ripped out. Some balding on the back of the neck would not worry me, but if there are injuries of any other sort I would separate. As far as the Muscovy Drake goes, they may never be fond of him since Muscovy and Mallard derived breeds can have a tendency to separate into their own groups. Biologically speaking think of it like a horse and a donkey similar yes, ability to produce offspring yes (mules), but not quite the same.