Very few dogs go through their lives without catching kennel cough (an upper respiratory infection most commonly caused by the Bordetella bronchiseptica bacteria) at least once. While this highly contagious, airborne disease can cause awfully uncomfortable symptoms (from a hacking cough and lethargy, to vomiting and a complete loss of appetite,) in the vast majority of cases, after a few days to a couple of weeks, it goes away as quickly as it started.
However, for some dogs (especially those whose immune system is compromised, due to age or other, unrelated conditions,) it can turn into very serious, often life-threatening illnesses, like bronchitis or pneumonia. Dogs should receive their Bordetella boosters at least once a year; those who are more fragile, or are more likely to be exposed to the disease (in daycare, at the dog park, or in a home they share with newly rescued canine friends,) can largely benefit from a vaccination every six months.
Needless to say, if your dog does catch kennel cough, you should make an appointment for him with his veterinarian, who will most likely subscribe an antibiotic treatment to make sure that no secondary infection develops.
Until your dog gets over this nasty illness, there are several simple steps you can take, to help him. As it is with the case with any home remedy, you may want to consult your veterinarian before starting to use any or all of the suggestions in this article, and stop as soon as you notice any undesirable reaction.