Both of our girls,Gypsy Rose and Gizzie Chavi (aged nearly 2 and 1 resp) have some similar type of problem although I suspect that it is "reverse sneezing" in their case... it sounds frightening and is often I think confused, even by vets for a collapsing trachea - I once heard a little Bichon frise cough in the same way as Gypsy Rose (only had her then) and I stopped and talked to the owners as they were pinching her nostrils, gently but firmly...I have done this ever since and it does seem to help. My girls even come to me now so that I can try it..! It could be worth a try? Another thing I do is blow very gently up their nostrils!! Distraction also works at times. Hope this helps, Ana xx