Collapsed Trachia and Stress

I've noticed that when Max gets stressed, he will show symptoms of a collapsed trachea and cough until he is recovered and can breath easily again. This isn't a sign I've seen from just stress before.  Or alternatively I haven't recognized it, because they seem to be pulling at their harnesses or collars due to over excitement when their trachea’s collapse.

Have you seen what appears to be a spontaneous collapsed trachea due to stress?

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