A Saint Bernard Puppy typically lives 8–10 years. Most of what determines whether it gets there is routine care rather than anything dramatic.
What to watch for in a medium dog
For this size class: weight gain and hip health. None is a reason not to own the breed; all are cheaper to manage early.
Vaccination and deworming
The core course starts around six weeks, rabies follows, then annual boosters. Deworming runs fortnightly to twelve weeks, monthly to six months, then quarterly.
A breed from Global / Various, living in India
The Saint Bernard Puppy was developed in Global / Various. The part that travels badly is rarely temperament - it is the coat and the tolerance for heat. Plan the year around that and most of the rest follows.
The annual check
Once a year for an adult dog, and book it before the hot months rather than during them.
Planning for about 9 years
A Saint Bernard Puppy is with you for about 9 years. Budget and routine both need to survive that, including the last quarter of it when a medium dog needs more veterinary attention than it did young.
Balancing playful against charming
Breeds described as both playful and charming need the two managed together rather than separately. With a medium dog that usually means a predictable routine first and training second - the routine is what makes the training stick.
Keep the records
Booster schedules run from the original dates, and a new vet asks for the history first.