Portuguese Water Dogs are exceptionally intelligent, courageous and spirited and have endless stamina. They are excellent working dogs and devoted companions. However they are not the breed for everyone. They require a lot of physical exercise and would not be suitable as a town dwelling dog. They also need a lot of mental stimulation and direction as they can become destructive if bored. They are a people orientated breed and should not be left alone for long periods of time. They thrive on being part of a family and get along well with children and other pets. Though not aggressive, they are alert and protective making them a good guard dog.