i keep reading posts where people are getting their dogs vaccinated every 3 years instead of every year, is this better for the dog?. and if so what happens if i had pet insurance and my dog got sick and they said they would not pay out because i didnt vaccinate often enough???.. i want to do whats best for my dog, not to keep some big shot happy by putting chemicals into my pet. also when i first get my puppy she will need her puppy jabs, is this also necessary?, and if so i will definitely be getting them done , i am mainly concerned about the ones that come after that.