(Boehringer Ingelheim) Avirulent live Bordetella bronchiseptica. Bronchi-Shield Oral is the only kennel cough vaccine that is administered orally. Bronchi-Shield Oral is for protection against Bordetella bronchiseptica in dogs 8 weeks of age or older. Give orally, instilling 1 ml between cheek and gums. Annual revaccination is recommended. Requires mixing. Order syringes separately.