Kennel cough is highly contagious and can be easily spread from dog to dog through direct contact or through the air. This is why it is often referred to as a "kennel cough," as dogs are particularly susceptible to the infection when they are housed in close quarters with other dogs, such as in kennels, shelters, or boarding facilities. Stressful situations, such as being boarded in a kennel or exposed to a large number of dogs at a dog park or obedience training class, can weaken a dog's immune system and make them more susceptible to kennel cough. Dogs with a weakened immune system, such as those undergoing chemotherapy or those with underlying health conditions like heart disease or respiratory problems, are more susceptible to kennel cough. Exposure to environmental irritants, such as dust, smoke, or mold, can irritate a dog's respiratory system and make them more susceptible to kennel cough. Kennel cough can be caused by a number of different viruses and bacteria, and not all dogs will experience the same symptoms or have the same triggers. If your dog is showing signs of kennel cough, it's important to seek veterinary care for proper diagnosis and treatment.