Should I be concerned? He is only 9 months old and makes a thick breathing sound through his nose all the time since the day we found him in a car lot at 6 weeks of age. Last week I awoke and it looked like he was either trying to vomit or gasp for air. No discharge, just a wet nose, eyes are clear, etc. I asked my vet about this 5 months ago, general exam found nothing concerning. She mentioned the only way look in there was some $1500 procedure. Kinda hoping I am overacting, I just never had a cat that sounded like Darth Vader and I wonder if he has some nasal defect.