Duck collapsing, holding neck oddly, lump

[AvengerofSquids]

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!

 

[AvengerofSquids]

Here are a few pictures of her. I can add more if you think they would help!

 

[Miss Lydia]

@casportpony

She def doesn't look like she is well. Is it possible she did get into something toxic? how are the others acting?
How old is she and when did she lay last if she is laying.

 

[casportpony]

Can you take a video, upload to youtube or vimeo, then copy/paste the link here?

 

[AvengerofSquids]

@casportpony

She def doesn't look like she is well. Is it possible she did get into something toxic? how are the others acting?
How old is she and when did she lay last if she is laying.

She's just over two years old. My other duck is acting fine. I do wonder about her getting into something toxic because I lost another duck a few months ago for unknown causes (but that seemed like she ate something bad.) As far as I can tell she has been laying fine.

 

[AvengerofSquids]

Can you take a video, upload to youtube or vimeo, then copy/paste the link here?

I don't have an account on any of those, but I will see what I can do.

She seems to have some more energy back after resting for a bit, but still holding her head in that strange position.

 

[AvengerofSquids]

I don't think I'm going to be able to get a video to you guys right now. I can try again later if my WiFi cooperates and accounts work.

Tori has more of her energy after lying down and now she can stand without issue and makes happy noises when talking to me, but her neck still worries me.