A reliable source for training information is a good Schutzhund club. The overwhelming majority of Schutzhund training is done by owner/handlers at local clubs. There are very few clubs in the US, making books and videos a vital source of information in that country. In the US, most clubs are affiliated with the American Working Dog Federation (AWDF), United States Boxer Association (USBA), American Working Malinois Association (AWMA), United Schutzhund Clubs of America (USA), Deutscher Verband der Gebrauchshundsportvereine (DVG), or German Shepherd Dog Club of America-Working Dog Association (GSDCA-WDA). Schutzhund clubs tend to be small, 20 or fewer members, because there is a limit to the number of dogs that can be trained in one session. Clubs often provide only limited formal assistance with tracking and obedience. To a certain extent, the clubs exist to provide the specialized resources needed to train the protection phase. However, a legitimate club will not permit a member to train only protection. Usually the more experienced members are willing to help the novice with tracking and obedience, though this is typically somewhat informal in the US.