When do Jack Russell Terriers stop growing?
As a small breed, Jack Russell Terriers usually reach their adult weight at around 10-12 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 Jack Russell Terrier
- 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 Jack Russell Terrier 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
- French Bulldog16-28 lb
- Beagle20-30 lb
- Dachshund16-32 lb
- Shih Tzu9-16 lb
- Cavalier King Charles Spaniel13-18 lb
- Miniature Schnauzer11-20 lb
- Boston Terrier12-25 lb
- Shetland Sheepdog15-25 lb
Frequently asked questions
How big will my Jack Russell Terrier get?
Most adult Jack Russell Terriers weigh 13-17 lb. Enter your puppy's weight and age in the calculator above for a personalized estimate.
How much should a 6-month-old Jack Russell Terrier weigh?
Typically about 10-13 lb, depending on sex and genetics.
At what age is a Jack Russell Terrier full grown?
Usually around 10-12 months.