The Portuguese Water Dog is a breed of dog. It is classified as a working dog by the American Kennel Club. Male Portuguese Water Dogs usually grow to be about 20 to 23 inches (51 to 58 cm) tall, and they weigh between 40 and 60 pounds (18 and 27 kg), while the females usually grow to be about 17 to 21 inches (43 to 53 cm) tall, and they weigh between 35 and 50 pounds (16 and 23 kg). Because they are working dogs, PWDs are generally content in being at their master's side, awaiting directions, and, if they are trained, they are willing and able to follow complex commands. They learn very quickly, seem to enjoy the training, and have a long memory for the names of objects. These traits and their non-shedding coats mean they excel at the various service dog roles such as hearing dogs (assistance dogs for the deaf), mobility dogs, and seizure response dogs.