OFA Orthopedic Foundation for Animals: The OFA rates the Hips and/or elbows of a dog at 24 months old or older. OFA24G means that when the OFA registered this dog in it's data base, it was 24 months old OFA 36 would mean the dog was 36 months old at registration. Only hips that are found to be E (excellent), G (good), or F (fair) are listed on the official AKC pedigree. ! Penn Hip Another method of testing used to rate hips for possible Degenerative Joint Disease . This test can be done on dogs as young as 5 months of age and the dogs are compared to other dogs whom have been tested and given a percentile where they would fall. Each hip is given a Distraction Index (DI) number and the lower the number, the tighter the hip. This test does not allude to a "passing" or "failing" hip score. UKC CH United Kennel Club Champion UKC GR CH United Kennel Club Grand Champion CD Companion Dog Title Awarded CGC Canine Good Citizen. An obedience title offered through the American Kennel Club which shows the handler has a dog that has appropriate manners to live in the community. It promotes good behavior and adequate pet training for any breed whether they are purebred or a mix breed from the Humane Society. HC Herding Instinct Certificate This is a certification that shows that the dog has natural herding ability and is especially necessary if you have a dog that is of the Herding Breed. Shepherds should have natural herding instincts. TDI Therapy Dog International A certification given to an animal that passes a series of tests which show the dog's temperament and the handler's own leadership is satisfactory to visit hospitals and nursing homes. These animals help to add therapy to patients whom are recovering from illness or who are being treated for terminal illness such as cancer.