Effective against canine distemper, adenovirus type 2, hepatitis, parainfluenza, parvovirus and leptospirosis. Meets or exceeds all usda standards. Broad spectrum protection at an economical price. For use on dogs and puppies 6 weeks of age and older. 25 doses per package. 25 DosePrice listed is PER DOSE. You must order in 25 DOSE INCREMENTS (example: 25, 50, 75, etc.)