Use this Shetland Shepdog puppy weight calculator to predict how big your puppy will get. Shetland Sheepdogs are a herding breed that typically reaches full size by around 9-12 months.
Enter your puppy's current weight and age to predict their adult size
Estimates based on breed growth curves. Individual dogs vary with genetics and nutrition — check with your vet for a personalized read.
A practical pick for medium-sized breeds.
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| Age | Weight |
|---|---|
| Birth | 0.3 to 1 lbs |
| 2 Months | 2 to 5 lbs |
| 3 Months | 4 to 8 lbs |
| 4 Months | 5 to 10 lbs |
| 5 Months | 7 to 13 lbs |
| 6 Months | 8 to 15 lbs |
| 7 Months | 10 to 18 lbs |
| 9 Months | 11 to 20 lbs |
| 10 Months | 13 to 23 lbs |
| 1 Year | 14 to 25 lbs |
| 1.5 Years | 15 to 25 lbs |
| 2 Years | 15 to 25 lbs |
Estimated from typical medium-breed growth curves and the Shetland Shepdog's adult weight range. Individual puppies vary — use the calculator above for a prediction based on your puppy's actual current weight.
New breed data, growth tips, and puppy-parenting insights, plus our free printable puppy growth tracker.
Shelties are prone to Collie Eye Anomaly, an inherited condition that can cause blindness and is usually screened for in puppyhood, along with hip dysplasia and dermatomyositis, a skin and muscle inflammation condition more specific to the breed. Regular ophthalmologic exams are worthwhile even in dogs that seem to be seeing normally.
A quality diet in portions matched to activity level; Shelties do well on standard small/medium-breed formulas.
The thick double coat sheds heavily, especially during seasonal blowouts; brushing 2-3 times a week (more during shedding season) prevents matting.
Highly trainable and eager to please — Shelties excel at obedience and agility, and that same trainability makes early work on excessive barking worthwhile given the breed's vocal tendencies.
The Shetland Sheepdog ("Sheltie") was developed in Scotland's remote Shetland Islands, where sparse vegetation favored smaller livestock and, in turn, smaller herding dogs than the mainland Collie. Despite looking like a miniature Collie, the Sheltie is a genuinely distinct breed shaped by that isolated environment.
Shelties are known for intense loyalty, high trainability, and a tendency to bark — a trait that made them effective watchdogs on isolated farms and one that new owners should be ready to train early.
