Sealydale Terrier

35-40 lbs
South Africa
Sealyham Terrier
Airedale Terrier
The Sealydale Terrier is a hybridization between the purebred Sealyham Terrier and the Airedale Terrier. Though both parent breeds are from the British Isles, the Sealydale Terrier was first bred in South Africa during the early 1900s.  The original role of the Sealydale Terrier was that of a vermin hunter.  The Sealydale Terrier is a medium-sized dog with a Terrier disposition and long, rough hair.  They are considered a rare hybrid and some people debate the modern-day existence of the breed.  Currently, the Sealydale Terrier is only recognized by one competitive breed registry, the Dog Registry of America.
purpose Purpose
history Date of Origin
ancestry Ancestry
Sealyham Terrier and Airedale Terrier

Sealydale Terrier Health

Average Size
Male Sealydale Terrier size stats
Height: 15-18 inches Weight: 40-45 lbs
Female Sealydale Terrier size stats
Height: 15-17 inches Weight: 35-40 lbs
Major Concerns
  • Hip Dysplasia
Minor Concerns
  • Cataracts
  • Glaucoma
  • Hemophilia
  • Von Willebrand's Disease
  • Hypothyroidism
  • Atopic Dermatitis
Occasional Diagnoses
  • Patellar Luxation
  • Elbow Dysplasia
Occasional Tests
  • Eye Examination
  • Radiographs
  • Blood Analysis
  • Blood Sugar and Thyroid Tests

Sealydale Terrier Breed History

The Sealydale Terrier is a hybridization between the rare Sealyham Terrier of Wales and the Airedale Terrier. Though both parents are from the British Isles, the Sealydale Terrier was first bred in South Africa in 1934 and is attributed to Miss M. Bodmer of Grahamstown.  Miss Bodmer kept detailed records of her breeding practices, and the Sealydale Terrier displayed early generational signs of breeding true to type.  The Sealydale Terrier was in high demand as a vermin hunter in South Africa but lost much of its popularity following World War II.  Additionally, most of the records on the Sealydale Terrier do not extend beyond World War II.  Some people debate the existence of multiple generations Sealydale Terriers, but so long as Sealyham and Airedale Terriers remain in the active population, the Sealydale will continue as a hybrid.  Owners can also review the respective histories of the parent breeds for additional insight. The Sealyham Terrier is a rare Welsh Terrier that developed in the mid-1800s to hunt vermin game, such as badgers.  The Sealyham Terrier, also known as the Sealie, is a tenacious Terrier and excellent companion that has made distinction within the show community as well, having earned four Best in Show Championships. Despite its distinction in the ring, the Sealyham Terrier comes in last as the American Kennel Club's most popular breed.  The first Sealie was registered to the AKC in 1911. The Airedale Terrier is also a Terrier of distinction, being the largest of the Terriers.  The Airedale male can weigh up to 70 pounds and be as tall as 25 inches.  The original name of the Airedale Terrier was the Waterside or the Bingley Terrier, but fanciers renamed the Terrier Airedale in the late 1800s to further distinguish its roots in the Aire Valley. The Airedale came to the United States in the late 1800s and was kept by Presidents Theodore Roosevelt, Warren Harding, and Calvin Coolidge.  At one time, the Airedale ranked in the top 20 most popular dogs in the American Kennel Club, which recognized the breed in 1888. 

Sealydale Terrier Breed Appearance

The Sealydale Terrier is a rare hybrid and is sometimes likened to a large Jack Russell Terrier in appearance.  The Sealydale Terrier stands at medium height, weighing up to 45 pounds.  Its coat is medium length and mostly white with splashes of color.  The Sealydale Terrier has medium-length legs that make the breed appear slightly longer than it is tall.  The straight legs are stocky and well-muscled, and the tail is medium in length and heavy.  The Sealydale Terrier's head is in proportion to its body with a long muzzle and dark, brown eyes. The ears are medium and dropped to the side of the head. He will look distinguished with his beard and eyebrows.
Eye Color Possibilities
brown Sealydale Terrier eyes
Nose Color Possibilities
black Sealydale Terrier nose
Coat Color Possibilities
white Sealydale Terrier coat
red Sealydale Terrier coat
black Sealydale Terrier coat
brown Sealydale Terrier coat
sable Sealydale Terrier coat
Coat Length
Short Medium Long
Coat Density
coat density
Sparse Normal Dense
Coat Texture
coat texture
Sealydale Terrier wiry coat texture
Straight Wiry Wavy Curly Corded

Sealydale Terrier Breed Maintenance

The Sealydale Terrier's double coat is waterproof, and this hybrid is considered a hypoallergenic dog.  As a double-coated, hypoallergenic dog, the Sealydale Terrier does not shed much, and weekly brushing with a pin or bristle brush can help keep the coat clean and tangle-free.  The Sealydale Terrier has sensitive skin and should not often be bathed.  Frequent baths might strip the natural oils of the skin and lead to dermatitis and other skin conditions.  The hair around the head and chin might catch dirt, debris, and moisture.  Owners should pay close attention to keeping the face clean to prevent foul smells or infections.  Otherwise, the Sealydale does not have a doggy odor.
Brushes for Sealydale Terrier
Pin Brush
Pin Brush
Slicker Brush
Slicker Brush
Nail Clipper
Nail Clipper
Brushing Frequency
fur daily fur weekly fur monthly
Sealydale Terrier requires weekly brushing
Daily Weekly Monthly

Sealydale Terrier Temperament

The Sealydale is a true Terrier but and can be stubborn at times.  However, they are a smart breed and train easily with a consistent, firm yet gentle owner who is committed to them.  The Sealydale Terrier is affectionate with its family and makes for an excellent playmate for children of all ages.  They are sturdy and can withstand playing with toddlers, though no dog should be left alone with young children.  The Sealydale Terrier is dog-friendly but might chase the cat due to its prey-mind.  Small to medium-sized vermin, such as rats, squirrels, and badgers are fair game to the Sealydale Terrier and owners should not let them off the leash in open areas. The Sealydale Terrier has medium to high energy and requires daily exercise.

Sealydale Terrier Activity Requirements

The Sealydale Terrier is an active Terrier that needs daily exercise to maintain a healthy mind and body.  This hybrid is fond of running even though it has short, stocky legs.  The Sealydale Terrier needs space to move around and prefers homes with backyards.  However, the yards should always be secured, and the Sealydale Terrier should never be left alone outside.  They do not tolerate being left alone for long and may develop boredom vices, such as digging or chewing.  Smaller, less active Sealydale Terriers may be able to adapt to apartment living, but this hybrid prefers country living and lots of space.  The Sealydale Terrier has a higher tolerance for colder climates but also does well in warm environments.
Activity Level
low activity medium activity high activity
Low Medium High
Rec. Walk Mileage Per Week
10 miles
walk mileage
Minutes of Activity Per Day
60 minutes
activity minutes

Sealydale Terrier Food Consumption

Cups Per Day
2.5 cups
cup per day cost cup per day cost
Daily Cost
$1.20 - $1.40
food bowls daily cost
Monthly Cost
$34.00 - $45.00
food bag monthly cost

Sealydale Terrier Height & Weight

6 Months
Male Sealydale Terrier size stats at six months
Height: 15.0 inches Weight: 37.5 lbs
Female Sealydale Terrier size stats at six months
Height: 15.0 inches Weight: 32.5 lbs
12 Months
Male Sealydale Terrier size stats at 12 months
Height: 16.5 inches Weight: 42.5 lbs
Female Sealydale Terrier size stats at 12 months
Height: 16.5 inches Weight: 37.5 lbs
18 Months
Male Sealydale Terrier size stats at 18 months
Height: 16.5 inches Weight: 42.5 lbs
Female Sealydale Terrier size stats at 18 months
Height: 16.5 inches Weight: 40.0 lbs

Sealydale Terrier Owner Experiences

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