tilly has a collasped trachia, and the way my vet explained it to me. was it is like the trachia is a paper straw that has collasped. when they get excited it brings on the coughing and it sometimes can be very scarry because it seems like she wont be able to get her breath back. Also I read some where
that it could also happen during A surgery procedure when they are being sedated for a pending surgery,teeth cleaning, etc.. I remember checking the definition of collasped trachia I wish I could remember where I read this I do believe on line, because it seemed to appear right after tillys teeth cleaning and her diagonosis with cushings?

should I find it I will post it! Sammy has reverse sneezing and I brought it up to my vet last week visit, and she said it was allergies

So I guess there are many explanations for both issues!