Breed · Dog

Border Collie

A working sheepdog from the Anglo-Scottish border, bred for stamina and biddability rather than looks.

Border Collies are extraordinary and they are not pets in the ordinary sense. This is a dog bred to work all day and think while doing it. Without a job it will invent one, and the jobs it invents — herding children, chasing cars, patrolling fences, barking at shadows — are the ones that land it in rescue at eighteen months. Give it work and it is unmatched. Give it a suburban backyard and a walk, and you will both be miserable.

At a glance

Lifespan: 12–15 years
Adult weight: 14–20 kg
Daily exercise: 2+ hrs, plus mental work
Trainability: Exceptional
Alone time tolerated: Poorly
Shedding: Moderate to heavy
Noise level: Barks with purpose
With children: Good, may herd them
With other pets: May herd everything

Colours · 5 listed

Working lines were never bred for colour and the recognised list is wide. One pattern below carries a genuine health consequence.

Black & white
Red & white
Tricolour
Blue merle
Sable

Right for you if

You do dog sport, or farm work, or run daily and want company.
You want to train something and keep training it for life.
Somebody is home, or the dog comes with you.
You find a busy, opinionated dog interesting rather than exhausting.

Wrong for you if

You want a dog that settles happily after a walk around the block.
The house is empty during the day.
You have toddlers and no plan for herding behaviour.
This is your first dog and you are hoping for the easy version.

Health testing — the specific questions to ask

DNA tests exist for Collie eye anomaly, trapped neutrophil syndrome and ceroid lipofuscinosis, and the UK Kennel Club lists all three for the breed.¹ All three are definitive. Ask for the parents' certificates.
Merle to merle breeding sharply raises the risk of deafness: a quarter of double-merle dogs were deaf in one or both ears, against under 4% of single merles.² The UK Kennel Club has refused to register merle-to-merle litters since 2013, citing impaired vision and hearing.¹ It is entirely avoidable — ask directly whether both parents are merle, and walk away if they are.
Hip scores matter here as much as in the big breeds — the UK Kennel Club lists hip testing for this breed too.¹ Working ability depends on sound hips and so does an ordinary comfortable life.

Sources

Border Collie — breed health, pre-breeding screening and breeding restrictions. The Royal Kennel Club 2026. Accessed 2026-08-31. United Kingdom The Royal Kennel Club The UK Kennel Club lists DNA tests for Collie eye anomaly, ceroid lipofuscinosis and trapped neutrophil syndrome for the breed, plus hip testing. It has refused to register merle-to-merle litters since 2013, citing impaired vision and hearing.
Strain GM, Clark LA, Wahl JM, Turner AE, Murphy KE. Prevalence of deafness in dogs heterozygous or homozygous for the merle allele. Journal of Veterinary Internal Medicine 2009; 23(2):282-6. International doi:10.1111/j.1939-1676.2008.0257.x PMID 19192156 One hundred and fifty-three merle dogs hearing-tested. Double merles were 10% unilaterally and 15% bilaterally deaf, against 2.7% and 0.9% for single merles. Most double merles were not deaf — the risk rises sharply, it is not a certainty.

Every source here was checked, not recalled. Where this page makes a health statement and no source appears against it, that is not an oversight we have hidden — it means the claim is not yet sourced, and the build reports how many are in that state.

Availability, registration and keeping requirements differ from place to place. Check the rules where you live before you commit to any animal — we describe animals, not law.