Sealyham Terrier

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18-22 lbs

The Sealyham Terrier is an independent, loyal, and affectionate dog. The Sealyham Terrier originated in Wales and is an avid hunter. The Sealyham is a rather small dog, but he can be stubborn at times. They were originally bred for badger, otter, and fox hunting; even now, a Sealyham finds great joy in chasing birds, rabbits, and other animals – including other dogs and cats. The Sealyham’s white coat was distinctly bred into the dog as hunters used the white coat to distinguish between the dog and the prey. The Sealyham Terrier was recognized by the American Kennel Club in 1911. It remains a popular show dog, but a rare breed in America.

badger, otter, and fox hunting
Date of Origin
corgi, west highland white, wirehaired fox, and bull terriers

Sealyham Terrier Health

Average Size
Height: 8-10 inches Weight: 23-24 lbs
Height: 8-10 inches Weight: 18-22 lbs
Major Concerns
  • Usually A Very Healthy Breed
Minor Concerns
  • Retinal Dysplasia
  • Lens Luxation
Occasional Diagnoses
  • Deafness
Occasional Tests
  • Eye
  • Hearing
  • Eye Examination

Sealyham Terrier Breed History

In the mid-1800s, Captain John Tucker Edwardes began developing the dog that would eventually become known as the Sealyham Terrier. The Sealyham was a mixture of the Bull Terrier, Basset Hound, West Highland White Terrier, Welsh Corgi, the Fox Terrier, Cheshire Terrier, and Dandie Dinmont Terrier. Captain Edwardes began breeding the dog for hunting tough but small game such as badgers, otters, and foxes. Edwardes kept crossing breeds until he found offspring that excelled in hunting ability. The Sealyham’s name comes from Captain John Tucker Edwardes’ estate, Sealyham. Edwardes was responsible for crossbreeding a number of dogs in order to produce the perfect hunting and gaming breed. Edwardes was rumored to have given neighboring farmers puppies; if, at eleven months, the puppies showed promise in hunting and gaming, Edwardes paid the farmer an extra fee to get the puppy back. The dogs became popular across England, and in 1903, the breed was first included in a dog show. England’s Kennel Club recognized the breed in 1910. The early 1900s saw great popularity in the little dog; they were often entered in dog shows throughout England. The American Kennel Club began recognizing the breed in 1911. A Sealyham Terrier has won “Best in Show” four times at the Westminster Dog Show. While the Sealyham is an excellent companion dog, they have never had the popularity with the American public that they had in England during the early 1900s. It remains a rare breed in the United States. 

Sealyham Terrier Breed Appearance

The Sealyham Terrier is a tiny dog; he has short but strong legs. He is rectangular in shape with a medium-sized tail that stands at attention. He possesses an alert and determined facial expression. His weather-resistant undercoat is soft; his outer coat is stiff and wiry. He is generally all-white; some dogs will present with white and lemon coloring. Other markings are brown, blue, or badger on the head and ears. His brown eyes have a sparkle that matches his personality and his black nose always points in the direction of an adventure.

Appearance of sealyham-terrier
Eye Color Possibilities
Nose Color Possibilities
Coat Color Possibilities
Coat Length
Short Medium Long
Coat Density
Sparse Normal Dense
Coat Texture
Straight Wiry Wavy Curly Corded

Sealyham Terrier Breed Maintenance

The Sealyham Terrier has a double coat; he requires frequent combing (two or three times a week) in order to prevent matting. The coat should be shaped or stripped every three months. The dog needs a moderate amount of exercise. Games with a ball or daily walks can provide the right amount of exercise. Remember, the Sealyham is a born hunter, so letting him off the leash as he walks may be an invitation for trouble. They will follow their nose, tracking interesting scents. The Sealyham is highly intelligent and requires a firm handler. He is independent, but loves constant attention. He may challenge his owner’s authority from time to time, so consistency is key with a Sealyham Terrier. The dog can do well either in an apartment dwelling or out in a home with a fenced-in yard; as long as he receives adequate exercise, the Sealyham is happy. 

Brushes for Sealyham Terrier
Nail Clipper
Brushing Frequency
Daily Weekly Monthly

Sealyham Terrier Temperament

The Sealyham is an active dog, yet he has a calm demeanor. He loves to chase other animals, even other household pets. He also loves to explore, dig, and bark. He is a very hard-working dog, and he can be strong-willed. It is of the utmost importance that handlers are gently firm with a Sealyham Terrier. They must be socialized to cats from a young age if owners wish Sealyhams to accept a feline friend. They are great watchdogs, and they are highly loyal and loving with their families. The Sealyham Terrier is good with older children who know how to handle them, and can be reserved around strangers.

Activity Level
Low Medium High
Rec. Walk Mileage Per Week
6 miles
Minutes of Activity Per Day
30 minutes

Sealyham Terrier Food Consumption

Cups Per Day
0.8 cups
Daily Cost
$0.9 - $1
Monthly Cost
$25 - $30

Sealyham Terrier Height & Weight

6 Months
Height: 6 inches Weight: 13 lbs
Height: 6 inches Weight: 11 lbs
12 Months
Height: 9 inches Weight: 17 lbs
Height: 9 inches Weight: 16 lbs
18 Months
Height: 9 inches Weight: 23 lbs
Height: 9 inches Weight: 20 lbs

Top Sealyham Terrier Breeders

Check out who made our list for the most reputable Sealyham Terrier breeders of 2018.
Shshown Terriers
Trinidad, Colorado
Good Spice Kennel
Cochranville, Pennsylvania
Cadoria Sealyhams
Nampa, Idaho
Thistle and Rock Sealyham Terriers
Holden, Missouri
Afterglow Kennels, LLC
Granville, Ohio

Sealyham Terrier Owner Experiences

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