I bought 6 females to add to my flock around a month ago. Around one week ago, one of the ducks started presenting symptoms. It started with a “squeaky” quack and she was shaking her head when she quacked. My first though was she was choking or clogged sinuses. I flushed sinuses and have tried to flush her throat as well. (With water and massaging just in case she was choking). The past few days she has just gotten more quiet and has been isolating from the others. I’ve also noticed her tail has began to droop, along with heavy open bill breathing. Any tips or advice on what to do? I’ll attach videos below