Like many other breeds, worms can be responsible for heart problems if proper vaccination schedules haven't been followed. (linkroll.com)
My Super Puppy Class is held in a controlled environment and I make sure that all the puppies that start class are at least 10 weeks old and on the proper vaccination schedule. (goodfamilydog.com)
Your vet will instruct you on the proper vaccination schedule for your new cat. (cat-lovers-only.com)