
I don't vaccinate against kennel cough, mainly as I understood the vaccine was only effective for around 3 months, plus there are many different strains of KC that the vaccine cannot cover all - I guess similar to the human flu jab. Another reason I don't is a friend of mine who did used to vaccinate, had a bitch who promptly developed KC as a result of the vaccine, it is live.
I do know someone who has used a homeopathic treatment as a preventative. I keep meaning to ask her what it is. She's quite happy with it and obviously thinks it works as she's been using it for some years.
KC is a sore point at the moment, apparently it's rife in my town and some idiot vet is telling it's customers that it's fine to walk their dogs out and about where other dogs go, so long as kept on lead. AAAARRRRGGGGGGGGGGHHHHHHHHHHHHHHHHHHHH! So, I now have to keep mine in or bundle them into the vehicle and drive miles to ensure we don't happen to sniff the blade of grass that the dog with kc sneezed all over 30 seconds before!!