Although his owner Marlon Grennan says Kong is a healthy pup, many people have legitimate concerns regarding his long term health. You see purebred dogs are, generally, in peak health. Much of this has to do with the way the breed has evolved over the years. And breeders swear by their health. Through careful selective breeding, genetic disorders that plagued the past generations are no longer present in the current generations. Consequently, these dogs are the gold standard when it comes to health. Whether it is true or not is still the subject of an on-going debate. Now because many don't consider Kong to be a purebred dog (his owner says otherwise) there are concerns regarding his health.