Pastoral Medium adult scale

Border Collie.

Brilliant, responsive and deeply engaged with their people, Border Collies can be wonderfully rewarding partners for active homes. They tend to thrive when given purposeful training, problem-solving and varied outlets for their herding intelligence. Just as importantly, they may need patient help learning how to relax and switch off.

At a glance

Typical adult pet: Roughly 12–22 kg · Exercise: Around 2 hours or more. These are broad planning ranges, not targets or guarantees.

What living together may involve.

Needs meaningful mental outlets and may need deliberate help learning to settle.

Grooming

Regular brushing; coat type and shedding vary.

Activity

Around 2 hours or more. Age, fitness, health, weather and the quality of enrichment can change what an individual dog needs.

Planning

Plan particularly for mental work and careful arousal management.

Training

Use kind, reward-based training and build skills gradually. Breed can suggest inherited tendencies; it cannot determine a dog’s personality.

Real-world size

Pet range first.
Show standard second.

Roughly 12–22 kg is a rounded planning range for ordinary adult pets. RKC show standard: around 53 cm; females slightly less. Neither figure decides whether an individual dog is healthy or proves pedigree. A veterinary body-condition assessment is more useful than aiming for a number alone.

Choose health and function.

Ask for the health tests relevant to both parents and verify results independently. Avoid exaggerated features that compromise breathing, movement, eyes, skin or ordinary activity. A responsible breeder or rescue should welcome careful questions.

Children, other animals, time alone and first-time ownership cannot be decided by breed label alone. Temperament, early experience, health, training, management and the household all matter.

Evidence & next steps

Check the current information.

Royal Kennel Club: Breed A–Z
Royal Kennel Club: Health Standard
PDSA: Dog-care guidance
Next: buying or adopting responsibly · Next: prepare for arrival

This page provides general planning information, not a veterinary assessment or a promise about an individual dog. Seek veterinary and appropriately qualified behaviour advice where needed.

Reviewed 18 September 2026 · Review sooner if evidence changes

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