Dog Talk Project participants are required to register only because we need a registered user name that allows our data base to keep each person's surveys together. In other words, we need to know that user "JaneDoe" has registered her four dogs in the "About Dogs" surveys, so that we can keep her survey answers for each of her dogs linked with her answers in other surveys. For example, if Jane completes our Nutrition survey for her dog Albert, we can link Albert's data with the new survey and know that he is a 3-year-old Border Collie who is active in Agility, without having to ask Jane to put that information into the survey a second time. It also allows Dog Talk members to come back in at any time to take new surveys, without having to tell us all about their dogs again, as that information is stored and will be automatically matched with them when they log on.