Here's a very helpful thread in the YT Library:
http://www.yorkietalk.com/forums/die...d-trachea.html
My vet runs his finger up & down their throat & said a dog w/CT will cough. That's one way to test it. A dog w/CT will cough when it's throat is barely touched. So it's probably reverse sneezing or something was irritating his throat. My Momo plays w/his ball all the time & I need to wash it several x's a day bc it will get dust on it along w/my long hair. One time he was making weird noises like something was stuck in his throat & I opened his mouth...my hair was in there! I pulled it out & he was fine. Another time, his poopie was stuck & I had to pull it out & my hair came out w/it!
loll I am an obsessive floor cleaner now...wish I had a roomba!