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Sealyham Terrier

Quick facts

Sealyham Terrier AKC Group: Terrier
Height: 9 - 10 inches
Weight: 22 - 24 pounds
Colors: solid white, white with lemon, tan, or badger-colored markings on the head and ears
AKC recognized in: 1911

The Sealyham Terrier is an original breed from Wales in the estate of Captain John Edwardes, situated in Sealyham, Haverfordwest. He intended the new breed to be used in quarrying game. The breed is thought to have been bred by crossing the Dandle Dinmont, the Fox Terrier, the West Highland White Terrier, the Corgie, and the now-extinct White English Terrier.

Distinct features of this dog are its slightly domed skull with indents on the eyebrows and muzzle, and its large black nose with large nostrils. Its ears hang down carried down the cheeks. Its jaw is square and its teeth meet in a scissors bite. Its wiry coat is weathered proof and keeps the dog protected from extreme cold or heat.

It has been described endearingly as the "most beautiful union between cheerfulness and courage".

Popular people who owned a Sealyham Terrier are Elizabeth Taylor, Cary Grant, Jean Harlow, Director Alfred Hitchcock, and Princess Margaret.

Hunting for badgers was later banned in most countries and this led to a decrease in the breed's population. Today, the Sealyham Terrier is listed among the most endangered dog species in the world.


Sealyham Terrier Summary
Affection three paws
Cold Tolerance four paws
Ease of Training three paws
Energy level three paws
Exercise Requirements three paws
Friendliness : Children three paws
Friendliness: Other Animals three paws
Friendliness: Other Pets three paws
Grooming Requirements five paws
Heat Tolerance four paws
Playfulness four paws
Protection Ability two paws
Watchdog Ability three paws

Described as cheerful and full of courage, the Sealyham Terrier is fun to be with. Though it is no longer hunting in the wild like it used to do hunting in packs, this dog still loves to be with other dogs and would like to be the pack leader. This is the area where the owner should stop his dog from developing the Small Dog Syndrome, most common behavioural change among terriers. The dog must learn at an early age that it has to follow the commands and rules of the house with regards to conduct among fellow canine animals and human beings.

t is usually the case with a terrier to behave abnormally due to human causes like lack of authority over the dog or consenting to the small dog's bad habits. When the Sealyham Terrier is well-loved and properly trained, it will become a loyal companion and will behave properly in the presence of strangers or other animals.


The average lifespan of the Sealyham Terrier is 12 to 15 years.

While the Sealyham Terrier is generally a healthy dog, it is susceptable to certain health problems. These problems include:

  • Lens Luxation - The dislocation of the lens of the eye from its normal location. Depending on where the lens dislocates to, this could result in glaucoma.
  • Retinal Dysplasia - An eye condition that produces small blind spots in your dogs sight, sometimes not even noticeable This is caused by round clumps or folds that form on the retinal tissue. Most cases of retinal dysplasia are hereditary.


Because of its size and robust body, the Sealyham Terrier is equally comfortable both in the city or in the country. She can adapt well to apartment life, as long as she gets walked at least daily. If you have a yard, make sure it is fenced in, because the Sealies like to wander off and hunt. Also beware, because Sealies also like to dig, so monitoring while playing in the yard is a must.

A 20 to 30 minute play session or vigorous walk is sufficient for her exercise needs.

Sealies have a waterproof double coat. To maintain this free of tangles, a brushing must be done at least three times a week. Also, stripping is needed to remove dead hair, at least twice a year. Clipping the hair may be an alternative, but this will increase the amount of shedding, and will change the texture of the outer coat.

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