
I areas where Parvo is by active many vets are recommending a third vaccine, which is just the parvo component, ( previous two distemper, hepatitis and parvo ) so your third vaccine at 16 weeks plus may be this
Lepto is two shots usually given alongside the DHP combo vaccine. I always ask for this to be done later, so do DHP at 14 -16 weeks and then start lepto at 18 weeks plus so as not to stress immune system with too many diseases all at once
Why do you not have the card to check on what the puppy has received ?