I have a 7 month old puppy he is a bit spoiled so when he is excited or just like that he bites like not exactly bites more like scratches from his teeth and he has quite big and sharp teeth so they do hurt and leave marks, he is vaccinated and he scratched me as a baby when he was unvaccinated so I got vaccination done of 4 dose with the titness shot the 4th shot was done on March 8th and he scratched me today too it's just a little mark on the skin, do I need to get vaccinated? He scratches quite often, he has done it quite a few times, his vet doc from my city said that you don't need another shot because the one you got covers a year but google says it covers only 4 months which are far over!