so sorry to hear Jellybean isn't well.
Hooting can be a sign of food going down the wrong way, for example if they dive into their hay or nuggets & forget to eat properly, just scoffing..... like piggies do

or more seriously if it happens on a regular basis & it isn't just a one off, it can be a sign of heart issues, other signs to look out for are regular weight loss or difficulty maintaining weight,
blue tinges to the extremities.. lips, toes, etc.
problems with reoccurring URI's
I will tag
@helen105281 as she has heart piggies & will be able to give you more info on this if required.
I think hers all seem to be doing well with regular meds & enjoy the same quality of life as any other regular healthy piggy.
but hopefully its just a piggy-piggy issue & wont happen again, would keep an eye on her though & seek veterinary advice again if it carries on.
URI's are a real nuisance, took ages for my Ellie to get back on track when she had hers.
Speedy recovery to Jellybean
from the girls & i xx