The Portuguese Water Dog is a breed of dog. It is classified as a working dog by the American Kennel Club. It is classified as a working dog by the American Kennel Club. The Portuguese Water Dog has recently gained more fame by being the chosen breed of US President Barack Obama, who has two of them, Bo and Sunny. Problems associated with this include the hair around the eyes growing so long as to impede vision, and matting of the body hair, which can cause skin irritations. For these reasons, PWDs must be trimmed about every two months and the coat brushed every other day. This is not a breed to be left alone for long periods of time, indoors or out.