I am a veterinary technician and office manager of a small animal hospital. I would absolutely recc a Bordetella vaccination when your dog is groomed. It guards against kennel cough, which is airborne and spread in kennels, grooming facilities, hospitals, and nose to nose at the dog park. Even if you pick a groomer that doesn't require one (or anything but a Rabies) I would recc that you always update everything for your own dog's safety. We require Rabies, Distemper/Parvo and Bordetella for all dogs admitted for grooming. Good luck!!