A group of 14 adult foxes was orally vaccinated with 2 ml Flury HEP strain 675, titre 10 8.2TCID 50. Each fox seroconverted neutralizing antibody titres ranging between 1:40 and 1:640. These foxes survived an intramuscular challenge with 8000 mouse LD 50 pathogenic rabies virus, whereas six out of seven unprotected control foxes died within 28 days. This study was accompanied by virus isolation, fluorescence microscopic examination and neutralization tests.