Chicken gasping for air and shaking neck/head?

[ChickenWitch1]

I have a chicken who keep stretching her neck, and opening her mouth super wide to gasp for air. She’s also shaking her head/neck a lot. It’s not gapeworms, we took her to the vet to be tested and she doesn’t have any worms. She’s not having diarrhea, and she has a good appetite. She’s eating everything I give her. We put tylan in her water for around 4-5 days but it didn’t she’s still doing it. We had a chicken who was doing the same thing a few weeks ago, and we unfortunately lost her. Can anyone tell me what’s happening? I have a video of her doing it but it won’t let me attach the file for some reason

 

[Wyorp Rock]

Can you please get a video of her?

Upload your video to YouTube and provide a link.

Is her crop emptying overnight?

You put Tylan in the water. Was that Tylosin powder or Tylan50?

 

[ChickenWitch1]

Can you please get a video of her?

Upload your video to YouTube and provide a link.

Is her crop emptying overnight?

You put Tylan in the water. Was that Tylosin powder or Tylan50?

i made a post on a facebook chicken group about it. That link should take you to it and the video is there. Yes her crop is emptying and feels perfectly normal. It’s Tylosin powder that i’m putting in her water. https://www.facebook.com/groups/everythingbackyardchicken/permalink/3290124817922053/?fs=e&s=cl

 

[Wyorp Rock]

Looks like she's adjusting her crop.
Make sure it's emptying overnight, if it's not, then begin treatment https://www.backyardchickens.com/ar...w-to-know-which-one-youre-dealing-with.73607/

Do make grit available and don't withhold food/water.

 

[LittleBANTAMchickens]

Maybe something lodged in her throat?