Sealyham Terrier

Dog Breed Profile

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Sealyham Terrier History

The Sealyham Terrier is a medium-sized, long-haired terrier. It is a longer, heavier version of the Welsh Corgi, although it has a shorter muzzle. It is closely related to the Dandie Dinmont, the Skye and the Cairn. The origin of the Sealyham is unknown. The Welsh Corgi probably provided the “foundation” stock for the modern Sealyham, although its influence is somewhat reduced today. The ancestors of the Sealyham were probably “Welsh” herding dogs. Although the name “Sealy” has been used to describe several breeds, the “pure” type was recognized by the Kennel Club in 1918. It has been suggested that the “modern” form of the “pure” type is descended from the Glen of Imaal Terrier, which originated in the area around the village of Glin in County Limerick, Ireland.

Time of Origin


Country of Origin


Sealyham Terrier Physical Characteristics

The Sealyham Terrier is a small, medium-to-large, athletic breed that typically stands between 17 and 21.5 inches tall at the shoulder and weighs between 30 and 40 pounds. They have a compact, sturdy, muscular, and sturdily built body with a narrow, rectangular head. Their ears are erect, triangular, and stand upright and alert. The Sealyham Terrier has a slightly curved tail that is typically docked. Their moderately long, stiff, and dense coat is rough, straight, and comes in blue or red. The Sealyham Terrier is a loyal, brave, and hardy working terrier with a friendly temperament.

Eye Colors


Nose Colors


Coat Colors


Height Range

Male Height Range: 8 – 10 inches

Female Height Range: 8 – 10 inches

Weight Range

Male Weight Range: 23 – 24 lbs

Female Weight Range: 18 – 22 lbs

Sealyham Terrier Health

Description of breed health.


11-13 yrs

Sealyham Terrier Health Concerns

Usually A Very Healthy Breed, Retinal Dysplasia, Lens Luxation

Sealyham Terrier Temperament and Behaviour

The Sealyham Terrier is an alert and agile breed of dog that was originally bred to hunt small game. They are outgoing, playful and sociable, and get along well with children and other pets. They are lovable and devoted companions, but can be stubborn and headstrong.

Sealyham Terrier Activity Requirements

Sealyhams are a cheerful, sweet-natured, and active little terrier. Smaller than many of the other terrier breeds, they are well suited to apartment life. While Sealyhams are not very high-energy, they do require regular walks. They enjoy going on hikes and walks with their families, and they do very well in urban environments. While they don’t require a ton of space, they do need a daily outing. If you’re looking for a small dog that will enjoy a daily walk and who doesn’t need a lot of space, a Sealyham may be the perfect pet for you. They are very adaptable and will do well in most home environments, as long as they get their daily exercise and attention.

Miles Per Day


Activity Per Day


Daily Food

0.8 cups

Kennel Club Recognition

American Kennel Club

Recognized by the American Kennel Club

Sealyham Terrier is part of the Terrier group.

Visit the American Kennel Club website.

The Kennel Club

Recognized by The Kennel Club

Sealyham Terrier is part of the Terrier group.

Visit the Kennel Club website.

Australian National Kennel Council

Recognized by the Australian National Kennel Council

Sealyham Terrier is part of the Terrier group.

Visit the Australian National Kennel Council website.

Canadian Kennel Club

Recognized by the Canadian Kennel Club

Sealyham Terrier is part of the Terrier group.

Visit the Canadian Kennel Club website.