Use this Miniature American Shepherd puppy weight calculator to predict how big your puppy will get. Miniature American Shepherds are a herding breed that typically reaches full size by around 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 | 0.4 to 1 lbs |
| 2 Months | 3 to 8 lbs |
| 3 Months | 5 to 12 lbs |
| 4 Months | 7 to 16 lbs |
| 5 Months | 9 to 20 lbs |
| 6 Months | 11 to 24 lbs |
| 7 Months | 13 to 28 lbs |
| 9 Months | 15 to 32 lbs |
| 10 Months | 17 to 36 lbs |
| 1 Year | 19 to 39 lbs |
| 1.5 Years | 20 to 40 lbs |
| 2 Years | 20 to 40 lbs |
Estimated from typical medium-breed growth curves and the Miniature American Shepherd'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.
Like Australian Shepherds, Miniature American Shepherds can carry the MDR1 gene mutation causing sensitivity to certain medications — DNA testing is worthwhile. They're also predisposed to hip dysplasia and Collie Eye Anomaly, an inherited eye condition; annual eye exams are recommended.
A quality diet matched to this breed's genuinely high energy — despite the smaller size, MAS dogs need real activity, and food alone won't substitute for it.
The medium-length double coat sheds moderately with heavier seasonal blowouts; brushing 2-3 times a week keeps it manageable.
Needs real mental and physical work just like its larger cousin — herding, agility, or obedience give this breed the outlet its intelligence and instincts require.
The Miniature American Shepherd was developed in the US starting in the late 1960s by breeding smaller-sized Australian Shepherds, reaching its current size by the mid-1970s. Originally called the Miniature Australian Shepherd, it earned full AKC recognition in the Herding Group in 2015.
The breed carries the same intelligence, herding instinct, and eagerness to please as its larger Australian Shepherd relative, just packed into a more moderate frame — a genuine working dog in miniature, not a toy-sized novelty.
