Sneezing is one of many symptoms of kennel cough, and the Bordetella bronchiseptica bacteria cause it. It affects your dog's trachea and bronchial tubes and can be mild to severe. Other symptoms include coughing, lethargy, fever, and nasal discharge. Kennel cough, or Canine Infectious Respiratory Disease (CIDR), can be transmitted airborne or through touching contaminated objects. It usually takes a dog ten days to recover from kennel cough, but it can differ from dog to dog. Moreover, you may wait for 6 to 14 weeks for your dog to get back in perfect condition.