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Sealyham Terrier

Sealyham-Terrier

An Adventure-Loving Terrier

Friendly, independent, playful

Sealyham Terriers are outgoing, loyal, and charming, small dogs. Sealys are very devoted to their families, but may be reserved around strangers. While they are very loving to their families, families with small children or animals aren’t a strong fit for Sealyhams. These adventurous dogs are best suited to live indoors as long as they have access to the outdoors. Ideal human companions for these terriers are singles, seniors, families, and outdoor enthusiasts. They are calmer than other terrier breeds, but still require moderate daily exercise to keep their even temper—a moderate walk or game session every day will suffice.

Understanding their unique needs will help keep them healthy and create a strong bond between the two of you. Explore this page to learn more about the breed’s history, health concerns, characteristics, and care needs. 

The Sealyham Terrier in the photo is not yet fully grown.

Breed Details

Height:10-12 in. Weight:18-24 lb Lifespan:11-13 years

Size
3

1=small 5=large

Grooming requirements
3

1 = little grooming - 5 = much grooming

Energy level
3

1 = low energy - 5 = high energy

Ease of training
1

1 = difficult - 5 = easy

Affection toward owners
3

1 = independent - 5 = very affectionate

Friendliness toward strangers
3

1 = shy - 5 = very friendly

Routine Care: Sealyham Terriers are well suited to apartment life as long as they are given a daily walk and frequent play sessions. They are an athletic dog that excels at dog sports like agility, obedience, and Earthdog. They also have a strong chase instinct, so they need to be leash walked and a fenced yard is a must.

Grooming: Brush their coat as needed, at least weekly. Twice a year stripping or clipping is also required for their wiry double coat.

Dental: Sealyham Terriers generally have good teeth, and you can keep them perfect by brushing them at least twice a week!

Ear Care: Clean their ears weekly, even as a puppy. Don’t worry—your veterinarian can show you how!

Sealyham Terriers form close bonds with their owners and enjoy being part of a family. With a patient and consistent leader, they make a cheerful and devoted companion.

Positive Traits:

• Alert, curious, and busy

• Adaptable to a wide variety of living conditions

• Even temper and gentle disposition

• Good watchdog with a loud bark

• Lively, with a friendly personality

• Bold, steady, and fearless

Negative Traits:

• Early obedience training and socialization is recommended

• Needs frequent attention from her family

• Needs daily exercise

• Likes to dig

• Sees cats and small animals as prey unless trained otherwise

• Can be possessive of toys and food, tending to show dominance

Whether you are considering adding a new Sealyham Terrier to your family or you already have one as a companion, it is important for you to know about the genetically linked diseases known to occur more often in this breed. Of course not every Sealyham Terrier will have these problems, but research shows your pal is more at risk than other breeds. 

By exploring the health concerns specific to the Sealyham Terrier you will become a knowledgeable and confident pet parent. Be sure to speak with your veterinarian about breed risks every time you visit and educate yourself on the most important signs to watch for at home. They're counting on you to be their health expert. 

Some health issues a Sealyham Terrier could encounter:

Eye Problems

Glaucoma

Cataracts

Displaced Lens

Dry Eye

Distichiasis

The Sealyham Terrier originated in Wales during the mid-1800’s and was bred for the typical terrier tasks of vermin control and hunting badgers, otters, and foxes. The Sealyham Terrier is calm and relaxed indoors, but is always ready for action and happy to investigate. They are loving and charming pets but can be a bit snippy with small children or small animals. Sealyhams require only moderate exercise: a leisurely daily walk will keep them happy.

Consult with a veterinarian if your Sealyham Terrier shows signs of the following:

• Blinking, redness, pain or itchiness around the eyes

• Squinting, watery eyes, bluing cornea, redness, enlarged eye

• Cloudiness to eye lens

• Painful eye, excessive tearing, eyes may appear asymmetric or cloudy

• Redness, squinting or greenish eye discharge

• Increased blinking, extra tears and squinting

• Bumping into objects, startles easily

• Dilated pupils in daylight, or increased "eye shine" at night

• Excessive licking or chewing, pawing at face and/or ears, head shaking, face rubbing

• Dry, scaly, sometimes itchy hairless patches on face or paws

• Dragging the hind toes and hind limb weakness

• Any abnormal shaking, trembling, or excessive involuntary tremors

• Unplanned pregnancy can be dangerous

• Misplaced or missing teeth, bad breath, hair and food stuck between teeth

• Easily startled, no reaction to unseen sounds

  • Care

    Routine Care: Sealyham Terriers are well suited to apartment life as long as they are given a daily walk and frequent play sessions. They are an athletic dog that excels at dog sports like agility, obedience, and Earthdog. They also have a strong chase instinct, so they need to be leash walked and a fenced yard is a must.

    Grooming: Brush their coat as needed, at least weekly. Twice a year stripping or clipping is also required for their wiry double coat.

    Dental: Sealyham Terriers generally have good teeth, and you can keep them perfect by brushing them at least twice a week!

    Ear Care: Clean their ears weekly, even as a puppy. Don’t worry—your veterinarian can show you how!

  • Characteristics

    Sealyham Terriers form close bonds with their owners and enjoy being part of a family. With a patient and consistent leader, they make a cheerful and devoted companion.

    Positive Traits:

    • Alert, curious, and busy

    • Adaptable to a wide variety of living conditions

    • Even temper and gentle disposition

    • Good watchdog with a loud bark

    • Lively, with a friendly personality

    • Bold, steady, and fearless

    Negative Traits:

    • Early obedience training and socialization is recommended

    • Needs frequent attention from her family

    • Needs daily exercise

    • Likes to dig

    • Sees cats and small animals as prey unless trained otherwise

    • Can be possessive of toys and food, tending to show dominance

  • Health Concerns

    Whether you are considering adding a new Sealyham Terrier to your family or you already have one as a companion, it is important for you to know about the genetically linked diseases known to occur more often in this breed. Of course not every Sealyham Terrier will have these problems, but research shows your pal is more at risk than other breeds. 

    By exploring the health concerns specific to the Sealyham Terrier you will become a knowledgeable and confident pet parent. Be sure to speak with your veterinarian about breed risks every time you visit and educate yourself on the most important signs to watch for at home. They're counting on you to be their health expert. 

    Some health issues a Sealyham Terrier could encounter:

    Eye Problems

    Glaucoma

    Cataracts

    Displaced Lens

    Dry Eye

    Distichiasis

  • History

    The Sealyham Terrier originated in Wales during the mid-1800’s and was bred for the typical terrier tasks of vermin control and hunting badgers, otters, and foxes. The Sealyham Terrier is calm and relaxed indoors, but is always ready for action and happy to investigate. They are loving and charming pets but can be a bit snippy with small children or small animals. Sealyhams require only moderate exercise: a leisurely daily walk will keep them happy.
  • Watch Out For

    Consult with a veterinarian if your Sealyham Terrier shows signs of the following:

    • Blinking, redness, pain or itchiness around the eyes

    • Squinting, watery eyes, bluing cornea, redness, enlarged eye

    • Cloudiness to eye lens

    • Painful eye, excessive tearing, eyes may appear asymmetric or cloudy

    • Redness, squinting or greenish eye discharge

    • Increased blinking, extra tears and squinting

    • Bumping into objects, startles easily

    • Dilated pupils in daylight, or increased "eye shine" at night

    • Excessive licking or chewing, pawing at face and/or ears, head shaking, face rubbing

    • Dry, scaly, sometimes itchy hairless patches on face or paws

    • Dragging the hind toes and hind limb weakness

    • Any abnormal shaking, trembling, or excessive involuntary tremors

    • Unplanned pregnancy can be dangerous

    • Misplaced or missing teeth, bad breath, hair and food stuck between teeth

    • Easily startled, no reaction to unseen sounds

Sealyham Terrier Discussions

Share your thoughts and experiences, ask questions, or just show your love for the Sealyham Terrier breed here!

Select Another Breed

To view the sources for the information listed on this page, see our Dog Breed Guide Reference page.

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