Wheezing chick with crackling lungs - emergency ASAP

[Cheekychook12]

4 week bantam chick was completely fine yesterday, now crackling in throat and gasping
Nothing I can see in the throat and no discharge anywhere

 

[Eggcessive]

Have you added any new birds to your flock recently? Where did the chick come from—hatched by you, hatchery, feed store from hatchery, or breeder? Did you by any chance just handle her before this happened and maybe pressed on her full crop? Some respiratory diseases can be passed through hatching egg or from a carrier if you got them from a breeder. What are they eating? If symptoms persist, or she develops bubbles in either eye, I would get some Tylosin antibiotic to treat her water. Dosage is 1 tsp per gallon for 5 days. Here is a place where it seems to be in stock:
https://pigeonsuppliesplus.com/prod...s9KZ582ynPPtg5FmKl4ymJiqYpGJCxNxMVMSPVYzRGFdi

 

[Cheekychook12]

Have you added any new birds to your flock recently? Where did the chick come from—hatched by you, hatchery, feed store from hatchery, or breeder? Did you by any chance just handle her before this happened and maybe pressed on her full crop? Some respiratory diseases can be passed through hatching egg or from a carrier if you got them from a breeder. What are they eating? If symptoms persist, or she develops bubbles in either eye, I would get some Tylosin antibiotic to treat her water. Dosage is 1 tsp per gallon for 5 days. Here is a place where it seems to be in stock:
https://pigeonsuppliesplus.com/prod...s9KZ582ynPPtg5FmKl4ymJiqYpGJCxNxMVMSPVYzRGFdi

He was hatched by me and have been introduced to any other chickens
I noticed in the morning before I handled him
He’s eating chick starter crumble
Thankfully after about ten minutes he stopped having any respiratory distress and seems fine now
I suspect the brooder was too dusty and he inhaled some dust
I have since moved him and sibling to a bigger new box with straw instead of coco peat which can be dusty
Also do you think the chick is female? Fairly certain it’s a he
Brooder setup

 

[Eggcessive]

They can react to dust and irritants. The one on the left has a really red comb in both pictures.