Sealyham Terrier
Great Britain, Small sized Terriers
- Size
- Small
- Height
- 25–31 cm
- Weight
- 8–9 kg
- Life expectancy
- 12–14 yrs
- Spirited
- Brave
- Sociable
- Stubborn
Heights and weights are typical adult ranges; individual dogs vary.
About the Sealyham Terrier
The Sealyham Terrier is a Welsh breed shaped in the mid-nineteenth century by Captain John Edwardes of Sealyham in Pembrokeshire, who wanted a fearless dog for badger, otter and fox work. It is long and low with a strong body, a big head with beard and eyebrows, and a weatherproof wiry coat that is white or white with light markings.
Temperament
Spirited, brave and sociable with its family, with a stubborn streak. Usually friendly but can chase small animals. Needs consistent training.
Exercise
Moderate: daily walks and play of 45 to 60 minutes. Often content with a garden and a walk.
Grooming
Wiry coat needs brushing a few times a week and regular stripping or trimming. White coat shows dirt and needs washing.
Care & wellbeing
Long-backed dogs benefit from lean weight and avoiding repeated jumps. Keep teeth clean.
Daily needs at a glance
For a typical 8.5 kg adult- Water
- 340 ml–510 ml
- a day
- Energy
- ≈ 560 kcal
- a day, neutered adult
- Exercise
- 60–90 min
- a day
- Grooming
- Brushing most days
Starting points from the same formulas as our calculators. Your pet's age, weight, activity and food all change the numbers. Work it out for your pet
Living with a Sealyham Terrier
Typical tendencies for the breed. Upbringing, training and the individual matter as much.
History
A Welsh terrier developed in the 19th century on an estate, bred for hunting badgers, otters and foxes. Sturdy and white, it was valued for courage and a keen nose.
Health
The breed can be prone to
- Eye conditions
- Deafness
- Skin allergies
Health tests to ask a breeder about
- Eye tests
- Hearing tests
- Lens luxation test
Not every Sealyham Terrier is affected, and this isn't a diagnosis. Read about common conditions and when to see a vet.
Cost to keep
Lower than average- Smaller food bills and medicine doses
- Regular professional grooming adds up
- A 12–14 year commitment
- Budget for breed-related health checks or insurance
A relative guide, not a price — costs vary a lot by country, insurer and lifestyle.
Is a Sealyham Terrier right for you?
Could suit
- Owners who can manage a good walk or two each day
- Smaller homes, as long as daily exercise needs are met
Think twice if
- You don't have time for frequent brushing or the cost of professional grooming
Not sure? Try the breed finder or read choosing the right dog breed.
Common questions
How big does a Sealyham Terrier get?
Adult Sealyham Terriers typically stand about 25–31 cm at the shoulder and weigh around 8–9 kg. Individuals vary, and males are often larger than females.
How long do Sealyham Terriers live?
Typically 12–14 years. Keeping them lean, active and up to date with vet checks gives the best chance of a long, healthy life.
How much exercise does a Sealyham Terrier need?
As a guide, around 60–90 minutes a day, split between walks, play and sniffing time. Puppies and older dogs need shorter, gentler sessions.
How much grooming does a Sealyham Terrier need?
Brushing most days. Check ears, teeth and nails as part of the routine.
Are Sealyham Terriers easy to train?
Generally trainable with consistent, reward-based practice.
Do Sealyham Terriers shed?
A little. Regular brushing keeps loose hair under control.
Are Sealyham Terriers good with children?
Many get on well with children. Always supervise young children with any dog, and teach them to give the dog space.
Can a Sealyham Terrier live in a flat?
Usually, yes — as long as they get enough daily exercise and time outdoors.
What health problems do Sealyham Terriers have?
The breed can be prone to eye conditions, deafness, skin allergies. Not every Sealyham Terrier is affected — ask a breeder about health testing, and your vet about what to watch for.
Written by Petopedia as general guidance, not veterinary advice. Ask your vet about health screening for this breed.
Breed details
- Country of origin
- Great Britain
- Type
- Small sized Terriers
- Internationally recognised
- 1954