MacInnes, known as Puck, is a grinder â sailingâs equivalent of a football lineman. With their brawn, he and other grinders operate hand-powered winches that raise and trim the sails, move the boom and do other tasks that require brute strength. But MacInnes has fallen victim to legal maneuvering and technology.
A study of a cross section of puppies showed that at 6 weeks, only 25 percent of puppies vaccinated were effectively immunized. At 9 weeks, that increased to 40 percent. At 16 weeks, 60 percent responded to the vaccination, and at 18 weeks, that number increased to 95 percent.
According to the American Animal Hospital Association (AAHA), puppies should be vaccinated every three to four weeks between the ages of 6 and 16 weeks (i.e. at 6, 10 and 14 weeks or at 8, 12 and 16 weeks), with the final dose given between 14 and 16 weeks of age.