Treachea Bronchitis
Bronchitis - Canine bronchitis is inflammation of the bronchial tubes, usually as a complication of an infection of the respiratory system, diseases like distemper, pneumonia, or as a consequence of exposure to extreme cold. May also occur as a result of a dog being in water for prolonged periods and not thoroughly dried off afterward. Breathing in irritating gases or continuous exposure to irritating fumes are other causes of bronchitis. Signs to watch for are variable coughs, often coarse, sudden and uncontrollable, especially after a long night's rest and gasping and crackly breathing. Older dogs are more likely to suffer chronic bronchitis, which frequently coincides with vascular insufficiency. The difficulties breathing and their coughs are distressing. They will also often vomit with a lot of mucus, alone or with abundant nasal secretion. Any change of room temperature can provoke a cough outburst. Keep your dog warm, especially the chest and back. It is important that he is under veterinarian treatment, due to the possibility of vascular repercussions.
Midnight has been diagnosed as having this, and is on new meds. Hopefully she'll get better soon.

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Brax
PS Erin-I liked your little list of "Things Midnight's Teeth Have Graced" haha