How Much to Feed a Border Collie
The workaholic of the dog world, Border Collies burn serious calories when they have a job to do. Using the veterinary RER/MER formula, an adult Border Collie of about 40 lbs needs roughly 1538 kcal per day — around 405 g (4 cups) of typical dry food. The calculator below is pre-set for the Border Collie: adjust the weight, life stage and food type to match your dog.
Border Collie portion calculator
Veterinary RER/MER formula — daily calories, grams and cups.
RER 615 kcal × 2.5 (active / working) = 1538 kcal, at 380 kcal/100g. Estimates for healthy pets — always confirm with your veterinarian.
Medium dogs like the Border Collie are where feeding guides on the bag are least reliable, because the healthy weight range is wide and activity levels vary enormously. Our 1538 kcal estimate assumes the profile selected above; if your Border Collie runs, hikes or works most days, recalculate with the “Active / working” setting before changing food brands.
A Border Collie in good condition weighs about 40 lbs (18.1 kg). The RER formula (70 × kg^0.75) gives 615 kcal at rest, and the active / working factor of 2.5 brings the daily target to 1538 kcal — approximately 4 cups of standard 380 kcal/100g kibble split into 2 meals of about 202 g each.
These numbers are a starting point, not a prescription. The calculator supports every life stage (puppy, puppy, adult, neutered/spayed, adult, intact, active / working, senior, weight loss plan) — a puppy can need two to three times the adult allowance, while a senior or a dog on a weight-loss plan needs noticeably less. Recheck the numbers after any change in weight, activity, food brand or neutering status, and always transition between foods gradually over 7–10 days. For medical conditions, pregnancy or lactation, follow your veterinarian's feeding plan instead.
Frequently asked questions
How much food should a Border Collie eat per day?
A typical adult Border Collie weighing 40 lbs needs about 1538 kcal per day (active / working), which is roughly 405 grams — about 4 cups — of standard dry food, split into 2 meals.
How is the Border Collie's daily portion calculated?
We use the standard veterinary formula: Resting Energy Requirement (RER) = 70 × (weight in kg)^0.75, then multiply by a life-stage factor. For a 18.1 kg Border Collie, RER is 615 kcal, and the active / working factor of 2.5 gives 1538 kcal per day.
How many times a day should I feed my Border Collie?
2 meals per day is the standard recommendation for a active / working dog — about 769 kcal (202 g of dry food) per meal. Puppies and kittens need 3–4 smaller meals instead.
My Border Collie seems hungry after meals — should I feed more?
Begging is not a reliable hunger signal, especially in food-motivated breeds. Judge by body condition instead: you should feel ribs easily under a thin fat layer. If your Border Collie is truly losing weight at 1538 kcal per day, increase portions by ~10% and re-weigh in two weeks.