Welcome to YorkieTalk.
Here is a great resource for vaccination information:
http://www.yorkietalk.com/forums/die...-overview.html
There is at least one more reference thread here in the YT library concerning vaccinations.
If I am not mistaken, the next set your pup should be given should come at one year of age.
I follow the protocol that breaks up the vaccinations. Break up the Lepto from the others, and all future rabies vaccs from the others. I choose not to do Lepto, but that is something you should discuss with your vet.