The Weimaraner, also known as Germany’s sleek and swift “Gray Ghost,” is an active dogs, requiring a high level of physical activity. They are hunting dogs and are highly intelligent. Weimaraners need socialization and training from puppyhood. Other pets, such as cats, rodents, birds or reptiles, should be kept away from Weimaraners because of the breed's hunting heritage. Weimaraners are ideal for owners who want a large, active dog for hiking and other outdoor activities. They also make good watchdogs. A Weimaraner is one of the easiest breeds to groom. Even when he has been running through mud, the dirt will just seems to fall off him.