Just as you would schedule regular doctor visits for yourself or pediatrician visits for your child, it is a good idea to have your pet see a veterinarian regularly. Even if your pet seems to be in perfectly good health, the fact is that you can never tell for sure if something might be wrong until your pet is evaluated by a professional.
The peace of mind that comes from knowing your pet is healthy is well worth it! Also, consider this: the cost of treatment is almost always higher than the cost of prevention. Preventative health care procedures like vaccinations and check-ups are far cheaper than treatments for diseases or injuries. For example, say your pet contracts a dangerous virus- a complicated treatment plan will be far more expensive than an initial vaccination for the virus would have been.