The disease can be brought on by bacteria, virus, fungus and parasites. Bacterial pneumonia is a byproduct of kennel cough or a problem with the dog's esophagus. Viral infections typically occur due to a respiratory infection or canine distemper. Fungi, such as Cryptococcus neoformans or Coccidioidomycosis immitis, are also causes of canine pneumonia. Various worms like lungworms or heartworms can be the cause of parasitic pneumonia in your dog as well.
Some other causes that can lead to dog pneumonia are: Allergic reaction to an irritant, such as cigarette smoke; system failure due to the malfunction of the heart and liquid getting into the dog's lungs.
Coughing is the primary symptom of the disease. Some other signs you should watch out for are: Sneezing, listlessness, lethargic, difficulty breathing, shortness of breathe and loss of appetite.