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Miniature American Shepherd (Mini Aussie) Puppy Growth Chart & Weight Calculator

How much should a Miniature American Shepherd (Mini Aussie) puppy weigh? Adult Miniature American Shepherd (Mini Aussie)s typically weigh 20-40 lb (9-18 kg). Use the month-by-month chart below or enter your puppy's weight to predict adult size.

Updated 2026-10-10 · Adult range based on typical breed standards

Miniature American Shepherd (Mini Aussie) weight chart by age

AgeExpected weight (lb)Expected weight (kg)% of adult weight
2 months5-10 lb2-4 kg24%
3 months7-15 lb3-7 kg37%
4 months10-20 lb5-9 kg50%
5 months12-24 lb6-11 kg61%
6 months14-28 lb6-13 kg71%
7 months16-32 lb7-14 kg79%
8 months17-34 lb8-15 kg85%
9 months18-36 lb8-16 kg90%
10 months19-37 lb8-17 kg93%
12 months19-39 lb9-18 kg97%
14 months20-40 lb9-18 kg99%
16 months20-40 lb9-18 kg100%

Ranges span typical females (lower end) to males (upper end). Individual puppies vary; your vet's body condition assessment matters more than hitting an exact number.

How big will my Miniature American Shepherd (Mini Aussie) get?

Free · instant · based on veterinary formulas

8 to 104 weeks
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When do Miniature American Shepherd (Mini Aussie)s stop growing?

As a medium-size breed, Miniature American Shepherd (Mini Aussie)s usually reach their adult weight at around 12-16 months, and are typically about half their adult weight by around 4 months. They may keep filling out (gaining muscle and chest depth) for a few months after their height stops increasing.

Feeding a growing Miniature American Shepherd (Mini Aussie)

  • Feed a complete puppy food.
  • Split food into 3-4 meals a day until about 6 months, then 2 meals.
  • Keep your puppy lean. You should be able to feel the ribs easily. Use the dog food calculator (puppy setting) as a starting point.
  • Weigh your puppy every 1-2 weeks and compare with the chart above.

Is my Miniature American Shepherd (Mini Aussie) puppy overweight or underweight?

A puppy slightly outside the chart range is usually fine if it is active, eating well and has a good body shape. Talk to your vet if your puppy is far outside the range, stops gaining weight, or looks pot-bellied or bony. Parents' size is a strong clue: puppies from smaller parents often finish at the lower end.

Other breed growth charts

Frequently asked questions

How big will my Miniature American Shepherd (Mini Aussie) get?

Most adult Miniature American Shepherd (Mini Aussie)s weigh 20-40 lb. Enter your puppy's weight and age in the calculator above for a personalized estimate.

How much should a 6-month-old Miniature American Shepherd (Mini Aussie) weigh?

Typically about 14-28 lb, depending on sex and genetics.

At what age is a Miniature American Shepherd (Mini Aussie) full grown?

Usually around 12-16 months.

Miniature American Shepherd (Mini Aussie) at a glance

Adult weight: 20-40 lb
Size: medium-size
Full grown: 12-16 months

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