Border Collie
The Border Collie is widely regarded as the most intelligent dog breed, developed on the Anglo-Scottish border for sheep herding. Their intense focus, problem-solving ability, and tireless work ethic set them apart from all other breeds. Border Collies need a job — without adequate mental and physical challenges, their intelligence becomes destructive restlessness.
12–15
years lifespan
30–45
lbs (male)
19–22
inches tall (male)
very high
energy level
Temperament
How Old Is Your Border Collie 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 Border Collie Age CalculatorCommon Health Conditions
Hip Dysplasia
~12% affected per OFA.
Typical onset: 1–4 years
Epilepsy
Idiopathic epilepsy is one of the most common health issues in Border Collies, with suspected polygenic inheritance. Onset typically between 1-5 years. Seizures vary from focal to generalized tonic-clonic. Most dogs respond well to anticonvulsant therapy.
Typical onset: 1–5 years
Collie Eye Anomaly
Inherited choroidal/retinal developmental defect caused by NHEJ1 gene mutation. Present from birth. Severity ranges from mild with no vision impact to colobomas and retinal detachment. DNA test available for breeding decisions.
Typical onset: 0–0.5 years
Trapped Neutrophil Syndrome (TNS)
Autosomal recessive inherited immune disorder specific to Border Collies. Bone marrow produces neutrophils but cannot release them into bloodstream, causing fatal immunodeficiency. Usually fatal by 4 months. DNA test available for carrier detection.
Typical onset: 0–0.5 years
Lifespan Factors
The median lifespan for a Border Collie is 13.5 years. Key factors that influence longevity:
- hip dysplasia
- epilepsy
- CEA
- TNS
- deafness
When Is a Border Collie Considered Senior?
Border Collies 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 Border Collie’s age in human years →