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.
Group A received a single vaccination at 12 weeks. Group B received a first vaccine between 8 to 10 weeks and a second shot at 12 weeks. When titers were measured (titers are a way to measure a dogâs level of immunity), 100% of the puppies vaccinated once at 12 weeks were protected. But only 94% of the puppies in Group B were protected â¦.