Canine Cough, or Kennel Cough, is a highly-contagious respiratory infection caused by a bacterium called Bordetella bronchiseptica and often, a virus called canine parainfluensza. It results in bouts of dry, hacking coughing and whitish phlegm. Coughing is often worse at night, and can be exacerbated by exercise, excitement, or pulling on the collar. Dogs get this disease from other dogs infected with kennel cough. It is especially common in boarding facilities where multiple dogs are housed together. It can severely irritate and inflame the tracheal and bronchial area, and in some cases, can lead to pneumonia. Uncomplicated Kennel cough will usually resolve within 1 to 3 weeks. Depending on the severity of the cough, veterinary attention may be necessary.