swamplink

← Counting Dogs & Tails · all breeds · charts · compare

Sealyham Terrier

origin: Wales · 6 figures in the corpus · Q39068

Every figure below carries this breed's name or id in its source study -- grouped by what it measures, not ranked. A breed appearing under a study here does not mean every other breed was tested and came back negative; it means this is what has a named source so far. See each figure's own page for its caveats.

Longevity

13.1 years (median survival) verified

Sealyham Terrier: median survival age, UK veterinary clinic population

  • UK primary-care veterinary clinic population (VetCompass), not a census of all dogs of the breed.
  • Hazard ratio vs. the crossbred reference group: 0.58 (95% CI 0.41-0.81, p<0.01).

Size & head shape

1 size class (1=Small, 2=Medium, 3=Large) verified

Sealyham Terrier: body size class -- Small

  • Body size and cephalic index classification per Supplementary Table S5; for breeds absent from the study's primary source lists, assigned by majority agreement among Dogs Trust canine-behaviour experts rather than measured directly on dogs.
2 cephalic type (1=Brachycephalic, 2=Mesocephalic, 3=Dolichocephalic) verified

Sealyham Terrier: head-shape (cephalic index) classification -- Mesocephalic

  • Body size and cephalic index classification per Supplementary Table S5; for breeds absent from the study's primary source lists, assigned by majority agreement among Dogs Trust canine-behaviour experts rather than measured directly on dogs.

Group

1 group membership (see subject) verified

Sealyham Terrier: UK Kennel Club group: Terrier; FCI group: Terriers

  • KC/FCI group columns record nomenclature presence only, per the table's own caption -- the study did not use group as an analysis variable.

Other

1 purpose class: hunting: terrier verified

Sealyham Terrier: purpose class 'hunting: terrier', from FCI group: Terriers

  • Registry group membership at time of the source table, not an independent behavioural assessment.
111 puppies registered verified

Sealyham Terrier (Terrier group): UK Kennel Club new registrations, 2025; -1.8% vs 2016

  • UK-only; a breed with 0 or blank registrations in a year may be newly recognised, temporarily unregistered, or genuinely absent that year -- the source table does not distinguish these.