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.
Depending on the risk level, puppies are often vaccinated for parvovirus as early as 5 weeks, but often, the first shot puppies receive is a combination shot at 6 to 9 weeks. Since combination shots are more likely to cause a reaction, some people recommend separating the combination shot.