When looking for a reputable breeder for long haired Dachshunds, it is important to ask about health testing and genetic screening. A responsible breeder will prioritize the health and well-being of their dogs and will conduct thorough health tests to ensure that their breeding dogs are free from any genetic diseases or conditions. Ask the breeder about the specific health tests they perform on their dogs, such as hip and elbow evaluations, eye examinations, and genetic screening for common Dachshund health issues.