Hello! Doctor, I Hv A Pet He Is 2 And

Hello! Doctor, I hv a pet he is 2 and half year old.. he had dog bite from a stray dog on Saturday. And in the month of September he had same thing and had given him d 3 days course of vaccine . I just want to ask u that what is the effective duration of the vaccine which has given him earlier. Does he still need the vaccination ????