My cousin passed away and I took her dog because no one wanted to take care of them. I found out that the girl who is 5 was last vaccinated June or July of 2004. The boy who was born in 2005 was never vaccinated I can't afford to pay the price to make up for all that they missed. Someone gave me a safter way. Just buy them from a vet & give it to them. Which ones do I give the boy, the 5way, 6way, or the 7way? Or can I leave out the Leptospria Bacterin & how often do I give it, is it trully 3-4weeks after the first shot?