If you want to vax, then do one round after 10 weeks. But not Leptospirosis 2 or 4. It’s too dangerous, and this country does not have a problem with Lepto, and it is treatable with antibiotics. Ask your vet how many actual cases of Lepto he or she has personally treated. Go to Novibac Lepto 4 Our Experiences FB Group for stories of how much damage this vax does. Maternal antibodies are usually present in puppies until approximately 16 weeks, possibly later. It’s best to titer first to see. Boosters are not needed, just titer. Titers can be low, which on,y means that the dog has not co e into contact with that particular disease recently.
Once a year vax is not and has never been needed. You’ve drunk the vet kool aid.. Titer your dog instead. Same with rabies, yearly or three yearly vax for that is not needed. Do you think vets vax themselves every year against rabies in the United States or other countries where it is present?