Sealyham Terrier: origins, characteristics and personality

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Sealyham Terrier

Once conceived to hunt badgers, foxes, and otters, the Sealyham Terrier is now a calm and nice companion dog. He is actually now considered the clown of the Terrier family.


The name of this dog breed comes from the  Sealyham House, near Wolfscastle in the Welsh county of Pembrokeshire. This is where Captain John Edwardes developed the breed between 1850 and 1891. The purpose of his creation was to help hunt for small game such as otters, badgers, and foxes.

The little white terriers quickly became popular in England and made their first dog show appearance in 1903. The first Sealyham Terrier club opened in 1908. The dogs became very popular during the years between both World Wars, but today they are little known are 155 out of 194 in popularity in the U.S.

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Sealyham Terrier: origins, physical characteristics and personality
Physical Characteristics

The Sealyham Terrier has a characteristic white double coat. The outer coat is wiry and weather resistant and the undercoat is dense. According to kennel standards, the height of this dog should not exceed 12 inches (30 cm) and their ideal weight is 18 lb (8 kg) for females and 20 lb (9 kg) for males.


Dogs of this breed are not as rowdy as other Terriers and more mellow. They are inquisitive and self-assured. They do not do well with strangers and make great guard dogs. Their friendly and alert nature makes them pretty easy to live with.

Caring for a Sealyham Terrie

This dog will easily consider itself part of the family and will expect to be treated as so. It is important for them to be exposed to the outside in order for them to socialize properly.

Frequent grooming is required due to his hair that can mat. He can easily adapt to not having a yard if he frequently walks outside.


This dog learns quickly and responds to commands. However, his sense of humor will affect the way he responds to commands, especially if there are people around.

Fun Facts

  • The breed was originally developed in Wales;
  • The Corgi, the West Highland White, the Dandie Dinmont, the Bull Terrier, Wirehaired Fox Terriers, and even some hounds are thought to be in the mix for the development of this breed.

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