Here Landseer wittily contrasts the scale and character of a bloodhound called Grafton and a West Highland terrier called Scratch. Both dogs belonged to Jacob Bell, who commissioned the picture. The picture's composition parodies the Dutch portrait tradition, whereby the subject is framed by a window, with an arm or hand extending over the edge, just as the bloodhound's paw hangs over the edge of the kennel. Landseer draws http://www.tate.org.uk/art/artworks/landseer-dignity-and-impudence-n00604