my little puppy has a collapsed trachea, it was catalyzed by a case of pneumonia ... i just say be careful and hope that you find out whatever is the cause soon, dogs with severe cases of CT are more prone to respiratory infections (at least that's what my vet says) - also there are varying degrees but better to catch and know things before things could get worse i say. but do a search, there is SOOOOO much info - highly reccomend it
I hope you're baby is doing better now though
