Again, similar to our cold or flu, the symptoms can vary from case to case. The most common symptom is the cough that gives kennel cough its name. In very mild cases your dog may just occasionally cough or gag a bit after exercise, eating or drinking, or becoming excited. In more severe cases your dog will cough excessively – you’ll recognize it because it’s been described as a ‘goose honk’ cough – and they may cough up phlegm or frothy saliva.
Dogs with more serious cases may not eat and may be lethargic or feverish. Much like a human with a cold or flu, everyone is affected differently.