
🐶 Dog · size Large
Colley
dog breed
Photo · Wikipedia FR (CC BY-SA)

Weight
20–32 kg
Size
Large
Lifespan
9–12 ans
Energy
Élevé
Coat
zibeline et blanc, tricolore(noir, blanc et feu), bleu merle
Maintenance
Élevé
Training
Très élevé
The Rough Collie (FCI designation: 1/1/156), or Scottish Shepherd, generally referred to simply as 'Collie,' is a variety of the Colley herding dog breed. Its image was popularized by the famous fictional dog Lassie, with a sable coat; however, the tricolor collie is most widespread and the blue-merle collie also has many enthusiasts. The Smooth Collie (FCI designation: 1/1/296) differs from the Rough Collie by its distinct standard.
Profile
At a glance
Energy
Élevé
Trainability
Très élevé
Maintenance
Élevé
Indicative profile — every animal is an individual.
⚡ Key facts in 30 seconds
L'essentiel
- 1Large size (20-32 kg): plan for space, exercise, and food budget.
- 2Life expectancy: 9 to 12 years on average, depending on hygiene and diet.
- 3High energy level — at least 1 hour of daily activity for balance.
- 4Regular grooming — brushing 3 to 5 times per week.
Chapter 1
Getting to know the Colley
Origins & history
A story told
Of British origin, this breed was established in Scotland towards the end of the 19th century. Initially, the breed was very close to the Border Collie. The Universal Geographic Dictionary (1826 edition) describes the colley (page 545) as the 'true shepherd dog'. It was Queen Victoria who brought this dog out of anonymity in 1860, for which she had a true passion. It was during her reign, in 1881, that the Collie Club Committee (the first colley club to be created) established the first breed standard 'Breed Standard' for rough-coated collies (Rough Collie) and smooth-coated collies (Smooth Collie). The breeds were born. The colley originally had a shorter and much coarser coat. It is believed to be the result of a cross between a Borzoi (Russian greyhound), from which it derives its fineness and bearing — the resemblance is striking in the smooth-coated colley — and an Irish Setter. In France, the first colley registered in the French Stud Book was on April 25, 1889. It was a dog imported from Ireland. The French Collie Club was founded in 1909. The standard (criteria used to evaluate a breed at an exhibition) of the American colley is quite different from the European one, it is larger and heavier, the stop is less pronounced, but it is much more robust. There are also more coats than the European colley, such as the entirely white body with sable head.
Character
Daily temperament
It is an intelligent, gentle, affectionate, patient and protective dog towards children, extremely attached to its masters, which makes it a very good companion. Its education requires firmness but gentleness, because it cannot tolerate injustice or brutality. It is quite wary of strangers and is also a good guard dog. This dog is very active, loves to run and has excellent aptitude for agility.
Physical
Breed standard
The characteristics of the head are of great importance and must be considered in relation to the size of the dog. Viewed from the front or in profile, the head has the shape of a well-drawn wedge, clearly truncated, with a smooth outline. The skull is flat. The sides of the head gradually and smoothly diminish from the ears to the tip of the black nose, without prominence of the cheekbones and without a pointed muzzle. The eyes are of medium size, positioned somewhat obliquely. They are almond-shaped and dark brown in color, except in blue merles where the eyes (one eye or both eyes or part of one or both eyes) are frequently blue or spotted with blue. The tail is long and the caudal vertebrae reach at least the hock joint. It is carried low when the dog is calm, but the tip rises slightly in a curve. When the dog is in action, the tail can be carried gaily but never over the back.
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Its coat can display three different colorations:
sable or fawn: the most classic (like the famous Lassie): fawn with white markings on the collar and extremities (legs, tail); tricolor: predominantly black with fawn markings (the 'fires'), white collar and extremities; blue-merle: similar to tricolor but the black of the coat is replaced by a gray-blue color speckled with black spots. The blue merle collie can have odd eyes; white: the coat is immaculate white but the white collie is not an albino animal (its nose and eyes are brown). This coat is not recognized in Europe — this is not the case in the United States, where all colors are allowed — but there are many enthusiasts. Life expectancy is approximately 12-13 years, but individuals have been known to live up to 17 years.
What if you adopted your future companion?
The Colley of your dreams may already be waiting in a shelter. Hundreds of colley (and equally wonderful crossbreeds) are looking for a family in France — every adoption starts a new story.
Editorial recommendation — no affiliate links.
Âge
What human age for a colley ?
The calculator is already set to the breed's adult size (espérance de vie 9–12 ans). Drag the slider to see the equivalence and corresponding life stage.
23 à 44 kg — a giant dog ages significantly faster than a small dog after maturity.
Equivalent human age
30years
Adulte
Most stable period. Monthly weigh-in, annual vet visit, dental care — this determines quality of life in later years.
Method: AVMA table: 15 human years in year one, +9 in year two, then +6 per year for a grand dog.
These equivalences are statistical benchmarks drawn from published veterinary tables. Every animal ages at its own pace, depending on genetics, diet and care. This calculator is neither a diagnosis nor veterinary advice.
Alert
To avoid for dog
Our database lists toxic ingredients and problematic additives by species.
- low-fat cocoa powderModerate
- maltitolModerate
- cocoa pasteModerate
- onion piecesModerate
Calculator · daily ration
How much to give a colley ?
Estimate based on the veterinary formula RER × DER, adjusted for dog. Adjust according to package recommendations.
Result
297 g
per day · 1128 kcal
149 g / repas (2 par jour)
Calculation for food of 380 kcal/100g.
FAQ
Frequently asked questions about Colley
Is a Collie suitable for apartment living?+
How much exercise per day for a Collie?+
What is the life expectancy of a Collie?+
Is a Collie good with children?+
If you like this dog
Breeds with similar profiles
For more information
Sources & official links
Supplementary documentation on reference sites — breed clubs, encyclopedias, veterinarians.
The right score for your Colley.
SokoScan calculates a personalized PawScore based on breed, age, weight and your pet's sensitivities. Free, instant.






