You probably see so many posts about taking a rabbit to the vet on here because so many people ask questions when their rabbits aren’t acting normally. They don’t need any shots EVER. They do, however, need to be spayed/neutered. Barring any health problems/sickness, they should be checked out every year or so, especially for their teeth. They can grow in uneven and cause a lot of pain, and the rabbit to not eat properly.