The calculators
Each one opens on its own page, with the formula and the sources behind it.
Food portion calculator
Daily grams for your pet, from the RER formula and the calorie density on your bag.
Open calculator → 02 · AgeingDog age calculator
Dog years to human years using size-banded life stages — not the seven-year myth.
Open calculator → 03 · AgeingCat age calculator
Feline life stages, and when mature and senior care should begin.
Open calculator → 04 · WeightIdeal weight & safe loss
Body condition scoring, a target weight, and a weekly rate that is safe for cats.
Open calculator → 05 · GrowthPuppy adult weight predictor
How big your puppy will get, with an honest range rather than one number.
Open calculator → 06 · HealthVaccination planner
Enter a date of birth, get the dose dates, and know when outings are safe.
Open calculator →Read before you decide
Calculators give you a number. These explain what to do with it — see all 29 guides →
French Bulldogs: the honest guide
America's number one breed for four years running, and the one vets worry about most. BOAS, heat risk and real costs.
How much should I feed my dog?
Why the bag's guide is an average for a dog that doesn't exist, and how to get a number for yours.
Your dog's age in human years
The seven-year rule gets the first two years badly wrong — and ignores size completely.
Is my pet overweight?
A 30-second hands-on check, what the 9-point score means, and how to lose it safely.