Heavier than any other spaniel, the Clumber is long, low and massive, with a broad head, heavy brow and soft amber eyes. It's named for Clumber Park in Nottinghamshire, England, and the AKC recognized it in 1884. Adults usually weigh 55 to 85 pounds, and the dense, soft coat is mostly white with lemon or orange markings, so expect white hair on dark clothes and furniture.
Many Clumbers are gentle, loyal and easygoing at home, sometimes reserved with strangers. Bred to flush and retrieve birds at a steady pace, they have moderate energy and good endurance. In Rockville's mix of suburban streets and stream-valley parks, that means unhurried walks rather than sprints. Plan for shedding, drool, snoring and a strong appetite, and remember that each dog's personality varies.