Smooth Collie

Sheepdogs & cattledogs

Medium

12–14 y

FCI group 1 · Sheepdogs and Cattledogs (except Swiss Cattledogs) · Derived from the adult weight midpoint (23.3 kg)

Uncited — a general reference figure, not a published one · no measured cohort for this breed

The Smooth Collie is a breed of dog developed originally for herding. It is a short-coated version of the Rough Collie of Lassie fame. Some breed organisations consider the smooth-coat and rough-coat dogs to be variations of the same breed.

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Summary from Wikipedia (CC BY-SA) · reference ranges from the Kintail breed dataset

Adult weight

Reference

Male

20.5–29.5 kg

Female

18–25 kg

The breed standard (The Kennel Club)

Two types. The AKC and the KC/FCI standards describe a different-sized Smooth Collie, so Kintail bands your dog against the one your region follows — set it in Settings. KC/FCI type: males 20.5–29.5 kg at 56–61 cm, females 18–25 kg at 51–56 cm. AKC type: males 27.2–34 kg at 61–66 cm, females 22.7–29.5 kg at 55.9–61 cm.

Weight for age

Stock data

Male

Female

Expected range

Expected range from the breed's own adult weight, kilograms. Growth reference: Salt et al. 2017, WALTHAM (15–30 kg band).

Heat cycles · females

Stock data

First heat

8–12 mo

typical

Interval

180 d

typical

Bleeding

~9 d

typical

Proestrus 9d

Estrus 9d

Diestrus 52d

Anestrus 110d

General figures for dogs, not for this breed — individual cycles vary widely.

Questions people ask

Adult males usually weigh 20.5–29.5 kg and females 18–25 kg. Most are close to their full size by around 15 months, though the last little bit of filling out takes longer. Growth reference: Salt et al. 2017, WALTHAM (15–30 kg band).

No Smooth Collie cycle figures are published here yet, so this is general guidance rather than a breed number: most females have a first season somewhere between six and fifteen months, and cycles then settle to roughly every 180 days. Smaller breeds tend to start earlier and larger ones later.

12–14 y — the usual range. Uncited — a general reference figure, not a published one · no measured cohort for this breed. How the later years go comes down to weight, teeth, exercise and regular check-ups far more than to the breed.