Additional information (Wiki): The Clumber is an efficient gundog, although not as fast as some. It is excellent for upland hunting in heavy cover, and can be a good retriever when trained. The clumber was bred to run through bushes with their big heads and thick, but soft coat. Nothing supposedly is going to stop them on the hunt. He is also an excellent tracker. Their temperament is described as gentle, loyal and affectionate, but dignified and aloof with strangers. They may be active as puppies, but are generally very calm, lazy, and unmotivated as adults. Disadvantages of owning a Clumber are said to be constant shedding, snoring, drooling, especially after a drink of water, and an incredible inventiveness for raiding kitchen counters, cabinets, and even the refrigerator. One disadvantage is that the dogs think of themselves as a lap dog. They will try to sit on your lap for your affection. They cannot jump on couches because of their weak hips. Puppies are especially curious and inventive. The combination of a very people-focused disposition and a strong urge to carry something has led to many missing shoes and other articles of clothing.

When hunting, the Clumber's flush is softer than that of the English Springer Spaniel or English Cocker Spaniel. This "English flush", as it is often called, is claimed by advocates to be more appropriate to flushing birds in heavy cover. Birds in heavy cover, the argument goes, have little chance of running. The more aggressive flush of the Springer and English Cockers could be necessary in open spaces, especially when pheasant hunting, as birds are more likely to run than flush in such circumstances.

While the breed was not shown widely in the United States prior to the late 1960s, in 1844, Lieutenant Venables, an officer of the British regiment stationed in Halifax, Nova Scotia, introduced the Clumber Spaniel to North America. The first Clumber Spaniel listed in the AKC registry, recorded for the date of 1878 was Bustler, an orange and white dog owned by Benjamin Smith of Nova Scotia. It is interesting to note that records of breedings of dogs in the United States existed long before the American Kennel Club was founded.