How long do Sealyham Terriers live?

The median lifespan of the Sealyham Terrier is 13.1 years, based on the 2024 McMillan et al. study of 584,734 UK dogs.

What health problems do Sealyham Terriers have?

Commonly reported conditions in the Sealyham Terrier include Primary lens luxation, Retinal dysplasia, Deafness, Allergies, Cataracts.

Is the Sealyham Terrier a healthy breed?

On the Breed Health Score the Sealyham Terrier scores 79 out of 100 (grade A), compared with an average of 71 across 155 breeds.

79/ 100

Sealyham Terrier Grade A

Median lifespani 13.1 yr · small · 8-10 kg

⇆ Compare Sealyham Terrier

The Sealyham Terrier is a small breed with a median lifespan of 13.1 years, which places it around the middle of the 155 breeds we rank for longevity. Commonly reported health conditions include Primary lens luxation, Retinal dysplasia, Deafness, Allergies. Its overall Breed Health Score is 79/100 (grade A), against an average of 71/100 across all breeds.

Score breakdown

Longevityi 65%

Conformationi 20%

100

Hereditary burdeni 15%

Higher is healthier. See methodology.

Common & hereditary conditions

Primary lens luxation Retinal dysplasia Deafness Allergies Cataracts

Red marks a life-threatening or major-welfare condition. Click a condition to see which breeds it affects. This list reflects commonly reported conditions, so better-studied breeds may show more; hereditary burden is the lightest-weighted part of the score. Source: RVC VetCompass / AKC / PDSA (indicative).

Thinking of a Sealyham Terrier? A breed's health profile affects insurance cost. Comparing pet insurance early, before any conditions become pre-existing, usually gets the best cover.

Compare with similar-size breeds

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Data & citation. Median lifespan: McMillan, K.M. et al. (2024) "Longevity of companion dog breeds", Scientific Reports (584,734 UK dogs). Data CC-BY 4.0. Source. Machine-readable: developer API. These are independent estimates for comparing breeds, not veterinary advice. Photo: Roberto Garrido via Pexels.