Iam a believer in ENS also. My 2 recent DKs came from breeders that go through the program. I can't really make a determination whether these 2 just matured quicker or were just super easy to train...or maybe both. Force fetching is probably my least favorite training, but these 2 are actually pretty fun. I don't know much about the HRC test, but mental stability in the test I do is imperative, as Iam sure it is in the HRC.