Photo by © diamonddust73

Sealyham Terrier - Breed Profile:

Origin: Wales
Colors: White
Size: Small
Type of Owner: Novice
Exercise: Moderate
Grooming: Regular
Trainability: Slightly difficult to train
Combativeness: Very dog-aggressive
Dominance: High
Noise: Likes to bark

Physical characteristics

The Sealyham Terrier is a low strong dog with a large head, doomed skull, and long square-shaped jaws. Bushy eyebrows, moustache and a beard are the breed's distinctive features. The body is short-coupled and substantial. The topline is level. The legs are well-boned and muscular. The long powerful head is in perfect proportion to the rest of the body. The nose is black, with large nostrils. The oval eyes are very dark; they set deep and wide apart. The pendent eats are rounded at the tip. The tail is customarily docked and carried upright. The movements are strong, quick, and free.
Sealyham Terriers weigh about 23 pounds. Their height is 10 to 12 inches.


Sealyham Terriers are loveable, loyal and independent dogs. Spirited, cheerful and fun-loving. Brave and courageous when necessary, bold and wilful at times. Nonetheless, this breed is not so rowdy as some of the other terrier breeds. Firm, calm, and consistent human leadership is necessary, as well as proper obedience training. Can be very combative with other dogs, so early socialization is highly important. Likes to dig and bark; the bark is surprisingly loud for a dog of this size. Reserved with strangers and does better with older, considerate children that know how to treat the dog properly. May get on well with other pets if raised with them from puppyhood, although the hunting nature of Sealyham Terriers should never be forgotten. Because of its independent streak and a desire to do everything in its own way, this dog is somewhat difficult to train.

Coat and grooming

The coat is double and weather-resistant. It consists of a soft, dense undercoat and a hard, wiry outer coat. The possible colours are solid white and white with lemon, tan or badger markings on head and ears. Regular grooming is necessary to keep the coat in good condition. Also, this breed requires professional trimming or stripping.


Fairly healthy, although some lines may be prone to deafness, skin and back problems, glaucoma. Does not do well in very hot conditions. The lifespan is 15 years and more.

Other interesting facts

Originally bred in Wales, the Sealyham was developed from the West Highland White Terrier, the Wire Fox Terrier, the Bull Terrier and the Dandie Dinmont Terrier. The breed derives its name from Sealy Ham, Haverfordwest, Wales. It was the estate of Captain John Edwards who created this breed.