Horses need dentists too.  In fact, they have more numerous and much bigger teeth, so they arguably need them even more than we do.  Clint is one such dentist.  But just because he has the kind of job every 6 year old boy would want doesn't mean life is easy.  His upbringing was tough and he had a near death experience that haunted him for years.  The best he - and you - can do is to live in the moment, not the past.