Thank you for your update. Hopefully, she will be able to enjoy some more time.
You are right, ducks often cause problems when kept in the same coop with chickens. Perhaps your brother can build his duck her own little coop and a nice run with a pool and even one or two other ducks for company.
Yes, I agree with you. Sadly they will not recover from this ordeal, no matter the amount of special care the owner is willing to provide, and judging by the reported smell and further description, I would put her out of her misery too.
These production hybrids are doomed from the start as their...
Some people use hormonal implants to give their hens a rest from egg laying and a chance to heal the prolapse, but it is rather costly and usually does not prevent them to get prolapsed again, once the hormones of the implant wear off (average 4-6 months).
Keeping her separate in a darker room...
Ok, so no hormonally overwhelmed male duck scorching his way into a chicken vent, one possible cause that can be crossed off the list.
Remains the possible prolapse with egg still inside, something like this:
Or a severe prolapse that keeps coming out.
To me the injury you describe sounds as if you have a male duck ranging with the chickens?
But it could also be a prolapse with the egg still inside.
Waiting for your pictures.