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.
Your veterinarian determines when to start and how many boosters your pup should receive based on health status and exposure. Usually, puppies receive a series of either three or four boosters three weeks apart, starting at either six weeks (6, 9, 12, 16 weeks of age) or starting at nine weeks(9, 12 and 16 weeks). Rabies is given at 16 weeks, and all of the core vaccinations are repeated a year later.