Guardians must fill out a detailed questionnaire about their dog’s history, behavior, training, upbringing. CU staff review the information submitted to us very carefully, our trained behaviorists talk to the guardian to determine whether the dog is appropriate for our off-leash environment. Dogs must play well with other dogs and not be aggressive. In some cases we may ask for references from a trainer or veterinarian. To minimize potential tension, we don’t allow unneutered male dogs, females in heat, or dogs less than ten months of age.