7 year old american eskimo/ shiba inu mix.

Started coughing over the weekend, but more of a clear my throat cough, figured she would eventually get it up and out.
Sporadic fits over two days, otherwise acting fine, eating, playing.
Took her in last night when it didn't get any better, vet heard the cough, ruled out any foreign objects, perfect xray of the airway, and a clearly reduced intra thoracic airway. Not cervical like typical, but deeper into the chest.

Very weird very acute sudden onset. No prior issues, ever, just a sudden manifestation of what is a chronic issue usually.

Trying a round of steroids to reduce any inflammation, but basically vet said nothing can realistically be done, it is a long and slow decline until eventually the airway entirely collapses. Stenting surgery is rarely successful, and other than a harness instead of a collar, said this is likely the way it will be for the months to years she has left.

Anyone have any experience with this? Any suggestions? I feel so bad for her, but the vet says it isn't bothering her. Can't even see how that can be

Vet said it has a very characteristic presentation. They call it a "goose honk" cough, and in retrospect it fits. The dog coughs, and does the mouth motions like they are trying to dislodge an object, but no other symptoms of any sickness, and no evidence of a foreign object.

Vet told me the diagnosis, I'm like huh? that's a problem that  babies and very small children have, and they outgrow it as the trachea gets firmer and larger. He's like, yeah, well, airways are airways, and in dogs the cartilage can weaken with age to partial collapse. Who knew?

That's great.
Ours improved to almost zero with the steroids. Now it is very sporadic, to the point we are trying to figure out if there might be a specific trigger.

Very strange.

What meds did they recommend?