Canine behaviorists, trainers, and breeders all agree that socialization is a must. The puppy should meet a wide range of dogs, including other puppies and adults, so that he learns how to behave and to interact with them every time he sees one. Socialization also includes walking on new surfaces, riding in the car, and attending puppy classes where he can learn to concentrate when surrounded by distractions. You need to provide your boxer with these life lessons early on.