On Friday and Saturday, my duck Tori collapsed a few times, falling over after standing up and trying to use her wings to catch herself. We kept an eye on her but she only did that a few times - along with some diarrhea - but otherwise, she was fine. She did not want to leave the pond Saturday and today. Tonight, when putting her up, she was holding her neck at an odd angle and fell over many times, shivering with her mouth held open. I felt her neck and there was a dense knot or lump under the skin that I hadn't noticed before. Research has revealed no clear answers so far. I'll attach some pictures (internet slow, so it'll take a minute) - does anyone have any advice for me? I have charcoal dust in case of botulism, and I have Epsom salts and apple cider vinegar - would those do any good? Thanks in advance!