Hiya, welcome to YT
My Teddy had his first annual vet visit and you can follow this link to read some info re vet advice for the Lepto. He did recommend it and it was part of a booster just as Teddy had when he was 11 weeks old.
http://www.yorkietalk.com/forums/yor...my-others.html
Hope that helps. I'm sure others can offer some more advice as this is just my experience with my dog and my vet
I meant to add that I'm in England so local advice may differ!!