Sealyham Terrier

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.

purpose Purpose
badger, otter, and fox hunting
history Date of Origin
ancestry Ancestry
corgi, west highland white, wirehaired fox, and bull terriers

Sealyham Terrier Health

Sketch of Sealyham Terrier
Average Size
Male Sealyham Terrier size stats
Height: 8-10 inches Weight: 23-24 lbs
Female Sealyham Terrier size stats
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
brown Sealyham Terrier eyes
Nose Color Possibilities
black Sealyham Terrier nose
Coat Color Possibilities
white Sealyham Terrier coat
pied Sealyham Terrier coat
cream Sealyham Terrier coat
brown Sealyham Terrier coat
blue Sealyham Terrier coat
Coat Length
Short Medium Long
Coat Density
coat density
Sparse Normal Dense
Coat Texture
coat texture
Sealyham Terrier wiry 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
Nail Clipper
Brushing Frequency
fur daily fur weekly fur monthly
Sealyham Terrier requires weekly brushing
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 activity medium activity high activity
Low Medium High
Rec. Walk Mileage Per Week
6 miles
walk mileage
Minutes of Activity Per Day
30 minutes
activity minutes

Sealyham Terrier Food Consumption

Cups Per Day
0.8 cups
Daily Cost
$0.85 - $1.00
food bowls daily cost
Monthly Cost
$25.00 - $30.00
food bag monthly cost

Sealyham Terrier Height & Weight

6 Months
Sketch of Sealyham Terrier at six months
Male Sealyham Terrier size stats at six months
Height: 6.5 inches Weight: 13.0 lbs
Female Sealyham Terrier size stats at six months
Height: 6.5 inches Weight: 11.0 lbs
12 Months
Sketch of Sealyham Terrier at 12 months
Male Sealyham Terrier size stats at 12 months
Height: 9.0 inches Weight: 17.5 lbs
Female Sealyham Terrier size stats at 12 months
Height: 9.0 inches Weight: 16.0 lbs
18 Months
Sketch of Sealyham Terrier at 18 months
Male Sealyham Terrier size stats at 18 months
Height: 9.0 inches Weight: 23.5 lbs
Female Sealyham Terrier size stats at 18 months
Height: 9.0 inches Weight: 20.0 lbs

Top Sealyham Terrier Breeders

Check out who made our list for the most reputable Sealyham Terrier breeders of 2024.
Top Sealyham Terrier breeder Shshown Terriers
Shshown Terriers
Trinidad, Colorado
Top Sealyham Terrier breeder Good Spice Kennel
Good Spice Kennel
Cochranville, Pennsylvania
Top Sealyham Terrier breeder Cadoria Sealyhams
Cadoria Sealyhams
Nampa, Idaho
Top Sealyham Terrier breeder Thistle and Rock Sealyham Terriers
Thistle and Rock Sealyham Terriers
Holden, Missouri
Top Sealyham Terrier breeder Afterglow Kennels, LLC
Afterglow Kennels, LLC
Granville, Ohio

Sealyham Terrier Owner Experiences

16 Years
4 People
So affectionate to people — bossy to other dogs. Loyal, sat next to me, leaning against my leg, while I wrote my dissertation and studied for the bar. So smart — we called her “The Great Communicator,” she rang a bell to go out, or if you were upstairs, rang a bell to get you downstairs, then would let you know what she wanted— water, or to go in her crate for a nap, or a treat (Sealys can sit up until you give up and give them what they want). Loved walks, loved to meet babies in their stroller, loved food, and wanted to be petted all the time, she would give everyone in the room an opportunity to scratch her head, then move to next person. Loved food, we had to watch her weight. Bigger bark than you’d expect, good watchdog, not yappy. LOVED squeak toys. When you took her out to potty, she’d go immediately, then turn around and lead you in. Just a fantastic dog!
6 years, 4 months ago
Book me a walkiee?
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