I had a direct communication somewhere in that thread. They had their ducks tested and found it to be zinc poisoning. Her husband was rebuilding an entirely new accommodation to fix the issue and the screen shot also shows people who got their ducks tested. You are being offensive by the way...
I understand completely but I would also be traumatised having to kill a dog to protect my animals. Its so unfair to be put in that position. If owners would just take responsibility and care.
How traumatising! A "sorry ..but..." doesn't cut it. Make a dangerous dog report for your birds ...yourself and everyone in the area that has a pet or small child. If someone can't contain their pet,they can't maintain the pet. End of story.
Make that call and let us know how you go. If...
My dogs were overly interested and uncontrollably excited around my first ducks so I kept them separated but visible until they lost some interest. Then they were all out in the open for periods with supervision. I used my voice to stop them if they got too focussed, made them sit and then...