When do Border Collies stop growing?
As a medium-size breed, Border Collies 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 Border Collie
- 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 Border Collie 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
- Bulldog40-50 lb
- Siberian Husky35-60 lb
- Australian Shepherd40-65 lb
- Pembroke Welsh Corgi24-30 lb
- English Springer Spaniel40-50 lb
- Vizsla44-60 lb
- Samoyed35-65 lb
- Basset Hound40-65 lb
Frequently asked questions
How big will my Border Collie get?
Most adult Border Collies weigh 30-55 lb. Enter your puppy's weight and age in the calculator above for a personalized estimate.
How much should a 6-month-old Border Collie weigh?
Typically about 21-39 lb, depending on sex and genetics.
At what age is a Border Collie full grown?
Usually around 12-16 months.