Laryngeal and tracheal chondrosarcomas are malignant, slow growing, progressive, invasive tumors of the larynx or voice box and trachea, which is the windpipe. These tumors have no known cause and are extremely rare in dogs. This tumor mostly occurs in middle aged and old dogs. All breeds of dogs are at risk but male dogs are slightly more prone to this condition than female dogs.
Most symptoms typically involve larynx, trachea and surrounding tissues. They include
Changes in voice
Loss of bark
Harsh, noisy breathing
Poor exercise stamina
Difficulty in respiration, dog may breath with mouth open
Loud noises while breathing
Bluish mucous membranes
Sudden collapse
Difficulty in ingesting food
Inability to swallow
Exercise intolerance (inability)
Coughing
Drooling
