Bull Terrier
The Bull Terrier is a uniquely shaped breed recognizable by its egg-shaped head and muscular, compact body. Developed in 19th-century England from crosses between Bulldogs and terriers, Bull Terriers were originally fighting dogs but were refined into tenacious, clownish companions. They are intensely loyal, endlessly entertaining, and possess a stubborn streak that demands experienced handling.
10–14
years lifespan
50–70
lbs (male)
21–22
inches tall (male)
high
energy level
Temperament
How Old Is Your Bull Terrier in Human Years?
Use our breed-specific calculator to find out, plus get personalised health and care guidance for your dog’s exact age.
Open Bull Terrier Age CalculatorCommon Health Conditions
Congenital Deafness
Especially common in white Bull Terriers (~20% affected).
Typical onset: 0–0.5 years
Hereditary Nephritis
Inherited kidney disease that can cause kidney failure.
Typical onset: 1–8 years
Aortic/Mitral Valve Disease
Heart valve abnormalities.
Typical onset: 1–6 years
Patellar Luxation
Kneecap displacement common in small/medium breeds.
Typical onset: 1–5 years
Skin Allergies
Bull Terriers prone to atopic dermatitis.
Typical onset: 1–3 years
Lifespan Factors
The median lifespan for a Bull Terrier is 12 years. Key factors that influence longevity:
- deafness
- kidney disease
- heart disease
- patellar luxation
- skin allergies
When Is a Bull Terrier Considered Senior?
Bull Terriers are generally considered senior at around 8 years of age. At this point, you should increase vet visits to twice yearly and watch for age-related health changes.
Check your Bull Terrier’s age in human years →