Hetch Hetchy Environmental Debates. Between 1908 and 1913, America witnessed its first national debate over environmental preservation when the growing city of San Francisco, California proposed building a dam in the Hetch Hetchy Valley to provide a steady water supply. The Hetch Hetchy Valley was within Yosemite National Park, however, and protected by the federal government.
Most puppies need at least three DAPP vaccines, two Bordetella vaccines, and one rabies vaccine during these visits to be protected for a full year. The next vaccine visit should occur approximately one year after the last puppy shots were given.ther vaccines are available but should only be considered under special circumstances. Often, protection against several diseases is offered in a single inoculation. For example, a DAPP vaccine protects against distemper, adenovirus, parvovirus and parainfluenza.
Multivalent vaccinations are given for convenience, so that your puppy doesnât need to be poked repeatedly, and are used by a majority of vets. A common multivalent vaccine that is recommended by the AAHA is DA2P, which vaccinates for canine distemper, adenovirus 2 (which also protects against adenovirus 1 that can cause canine hepatitis), and canine parvovirus.