Boxers began in late nineteenth-century Germany, where the Bullenbeisser, a hunting dog that held boar and deer, was crossed with English Bulldogs. The result is a square, muscular dog with a short, shiny coat in fawn or brindle, often with white markings, a black mask and a blunt muzzle. Males commonly weigh 65 to 80 pounds, and females run lighter.
Many Boxers are clownish, affectionate and physical, and they often stay puppyish well into adulthood. That energy needs a daily outlet, patient reward-based training and a cool place to recover. The thin coat gives little protection from sun, so pale or white-marked dogs can sunburn. Dogs listed as Boxers are often mixes, so size and temperament can vary quite a bit.