Country of OriginWales
Nicknames and Other NamesWelsh Border Terrier
Cowley Terrier
Scientific NameCanis lupus familiaris
Breed TypePurebred
GroupTerrier Group
Bred Forhunting small game and
family companion
Life Span12-14 years
Ideal WeightMale: 23-24 pounds
Female: slightly less
Ideal Height10.5 inches (male and female)
Fur TypeDouble-coated, wiry and
weather-resistant outer coat
Common ColorsWhite
MarkingsLemon markings, Tan markings,
Black markings, Badger markings
AvailabilityModerately available
AchievementsFeatured in movies
Suitable for ApartmentsYes
Used in World WarNo
Most Similar ToGlen of Imaal Terrier

The Sealyham is a funny and active terrier who is always ready for action. They are very curious and happy to investigate and devoted to their family.

Like other terriers, the Sealyham Terrier is very brave and spirited, they are quite sturdy and enjoys being outdoors. They are often recognized by their “fall” the large amount of hair covering their forehead.


The Sealyham is one of many breeds that developed in the middle of the 19th century. The Sealyham was originated in Wales by captain John Edwards.

Many breeds including Dandie Dinmont Terrier, West Highland White Terrier, Welsh Corgi, Bull Terrier, and Wirehaired Fox Terrier were crossed to develop the Sealyham Terrier we know today.

The Sealyham Terrier was recognized by the AKC in 1911, and the American Sealyham Terrier Club was founded in 1913.

Are They Child-Friendly?

Yes, Sealyham Terrier is easy going with children, especially with the older ones who know how to handle them. They may not be the best choice for families with small children or toddlers.

Any interaction between small children and dogs should always be well supervised by an adult to make sure their playtime doesn’t become boisterous which could result in someone being knocked over and get injured.

Temperament, Personality And Behavior

The temperament of Sealyham Terrier is alert, calm, fearless, friendly, intelligent and even-tempered. They are very gentle and relax breed but at times they love to hunt. They are possessive when it comes to their people and property and can be aggressive to other dogs and pets in their homes.

The Sealyham is very well-tempered which makes them well-suited to city or country life. They don’t bark unnecessarily although being alert by personality. They are probably welcoming to the guest.

Sealyham Terrier Are Aggressive With Other Animals
Sealyham Terrier Knocking Rat Image Via Youtube

The Sealyham is very active by personality and loves to explore and learn new tricks. They are very hard-working and can be strong-willed. They are very loyal and loving with their families and make good watch-dogs.


Training a Sealyham terrier can be difficult as they are independent. Therefore they might not be suitable for a first-time dog owner.

Training a Sealyham requires patience and would be easier if you are using firmness, consistency and positive reinforcement techniques in their training. They are quite stubborn, so make their training fun and short as much as possible so that they don’t get bored easily.


Quick facts about Sealyham are:

  • The English Kennel Club first recognized this breed in 1910.
  • They were specially bred to hunt small game.
  • They were popular with past Hollywood stars.
  • They are champion show dogs.

Health Issues

General HealthHealthy
Common Health IssuesGlaucoma, Primary Lens Luxation,
Ear Infections, Intervertebral Disk Disease
Vaccination RequiredRabies, Kennel Cough, Canine Distemper,
Canine Parvovirus, Canine Parainfluenza,
Canine Coronavirus, Leptospirosis
SheddingNone to Minimal Shedder
DroolingAverage Drooler
GroomingAverage Grooming Required
Weight Gain PotentialAverage
Separation AnxietyLow Chance
Diets and SupplementsProtein: 23%
Fat: 8%
Digestive Enzymes

Like all other breeds, the Sealyham terrier prone to suffer from some common health issues, which include:

  • Primary Lens Luxation (PLL): a disorder that is characterized by weakened zonular fibers.
  • Congenital Deafness: It may be inherited or acquired by an illness such as toxic exposure, liver disease, the side effect of a drug


The Sealyham are found in Five Color Patterns, such as:

  • White
  • Lemon & White
  • Blue & white
  • Brown & White
  • Badger & White.


Sealyham Terrier Puppies Are Quite Active
Sealyham Terrier Puppy Running Image Via Pet4Homes

The Sealyham terrier can give birth 4 puppies at a time. The cost of a Sealyham terrier puppy is $800-$2000.

Which Dogs Similar To?

Dogs similar to Sealyham Terrier are:

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