Young puppies are highly susceptible to certain infectious diseases and
should be vaccinated against them as soon as they are old enough to build
immunity. These diseases are distemper, infectious
hepatitis, parvovirus, parainfluenza, and
rabies. Leptospirosis, giardia, coronavirus, bordetella,
bronchiseptica, and Lyme diseasevaccinations are optional,
depending on the occurrence of these diseases in your area and your dog’s individual risk factors.
The American Animal Hospital Association...