HELP! My chicken is gasping for air, rattling noises and sneezing after it eats food!!!

[Serphial]

In the video she looks good. Personally, if she's not showing any symptoms of respiratory disease or distress, then I wouldn't administer any more antibiotics.

Get some photos of her poop if you can.

Carol (@azygous ) is right, she may have been experiencing stridor since you mentioned that she was first gasping after eating/drinking. A bit of food stuck in the airway can cause distress.

IF you feel you need to continue with antibiotics - what are you giving? Is it Tylan50? What dosage?
Did you know that you can give injectable Tylan50 orally? I would go that route since Tylan50 needs to be given 3 times a day for 5 days - that many injections on such a small bird, I would worry about injection site necrosis.

Also, what are you feeding her? Does she have grit available? Is she drinking well?

Do you normally keep her inside or did you just bring her in for observation?

Tylan 50 has not been available anywhere to buy around me and has been on backorder for months and months. I have Tylan 200. I have been giving injection 0.2ml once a day. (Only 2 injections) But now I quit that and just putting Tylan soluble in her water instead. I seen her drink some water earlier. Mainly just eating good. I keep her outside but took her in to separate from others and to keep warm. She has pellets, 8 way scratch, and mealworms.

 

[Wyorp Rock]

She has pellets, 8 way scratch, and mealworms.

OK so you are giving her Tylan soluble in the water. Is she drinking the water o.k. though? Some birds refuse to drink water if it's got something added to it.

She's only 5 months old, she's not laying eggs yet is she? Is it layer pellets? Are you mixing mealworms and scratch with her pellets or are those given separate and sparingly as treats?

Does she have poultry grit available free choice (on the side)?

 

[Serphial]

OK so you are giving her Tylan soluble in the water. Is she drinking the water o.k. though? Some birds refuse to drink water if it's got something added to it.

She's only 5 months old, she's not laying eggs yet is she? Is it layer pellets? Are you mixing mealworms and scratch with her pellets or are those given separate and sparingly as treats?

Does she have poultry grit available free choice (on the side)?

I normally put vitamins and electrolytes plus in everyone’s water and turns it little yellow but they all grown to drink it. The Tylan soluble is clear so she wouldn’t know anyhow. She has the scratch separate from her pellets and the mealworms is only given as a treat yes. She doesn’t have no poultry grit. Do you recommend me picking some of that up? She’s not layed yet

 

[Wyorp Rock]

I normally put vitamins and electrolytes plus in everyone’s water and turns it little yellow but they all grown to drink it. The Tylan soluble is clear so she wouldn’t know anyhow. She has the scratch separate from her pellets and the mealworms is only given as a treat yes. She doesn’t have no poultry grit. Do you recommend me picking some of that up? She’s not layed yet

Yes on the grit, she needs grit to process scratch.
Do you have other chickens?

 

[Saaniya]

Her color seems normal. Eyes are bright and she seems alert. No facial swelling or eye discharge to indicate respiratory disease. She seems normally energetic. I see nothing to indicate a sick chicken.

I can't hear any breathing noises on the video. I'm going to guess this may be stridor caused by a tiny obstruction in the trachea. If it is, her normal movement and change of positions during wakefulness and sleep should cause it to resolve itself as is most often the case.

I think it's happening with me yesterday my roo pecking on wall then started Coughing with each move by evening his cough become rattle it's still in his breath and he Cough is it stridor

 

[azygous]

Is he actually eating the wall material? Is this material spongy and absorbs liquid?