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Worried you're feeding your fur kid wrong?
Most pet parents are. The bag chart gives a vague range, every article says something different — and your dog can't tell you she's gaining weight. PetKib turns one number (body weight) into exact daily calories, grams, cups and a meal-by-meal schedule. The same math your vet uses.
🐾 🦴 🐾 The quiet problem: we love them too much
Pet obesity isn't about neglect — it's about not knowing. Extra treats, a slightly overfilled bowl, and "she looks fine to me" add up quietly, year after year.
~6 in 10
pets are overweight
Roughly 59% of dogs and 61% of cats carry extra weight, per the Association for Pet Obesity Prevention.
Most
owners can't see it
In the same surveys, most owners of overweight pets believed their pet was "a normal weight." Fluff hides it well.
1 chart ≠ your pet
bag labels are vague
Feeding charts cover huge weight ranges and don't know your pet's age, spay/neuter status — or whether those "cups" match your food's density.
The fix isn't feeding less out of guilt. It's feeding the right amount on purpose.
Start with your breed
A Lab and a Frenchie at the same weight shouldn't eat the same. 65+ photo guides cover origin, lifespan, healthy weight and the feeding quirks nobody tells you.
Feeding plans for every fur kid
Dog
Feeding and water in one plan — calories, grams, cups, meal times and the water bowl target.
Get the plan →
Cat
Kitten-specific math, wet-food handling, feeding and water together.
Get the plan →
Fish
Tank volume and weekly water change in liters, gallons and bottles — plus the 2-minute feeding rule.
Calculate →
Not a guess. A veterinary formula.
Every PetKib result is computed from the same equations printed in veterinary textbooks — nothing invented, nothing hidden.
Step 1 · Resting Energy Requirement
RER = 70 × (kg)0.75
Step 2 · Life-stage factor
× 1.2 – 3.0
A puppy needs ~3× RER; a neutered adult ~1.6×; a senior cat ~1.2×. Divide by your food's kcal/kg and you get exact grams per day.
Where the numbers come from
- 📚 Merck Veterinary Manual — the RER equation (70 × kg0.75), the standard resting-energy formula used in clinical practice.
- 📚 AAFCO — life-stage energy factors (growth, adult, senior) and the mandatory kcal/kg labeling that makes food math possible.
- 🎓 UC Davis veterinary nutrition — the "treats ≤ 10% of daily calories" rule built into every plan.
- 🧮 Show-the-math policy — every result page displays the inputs and formula used, so you can verify it or ask your vet to.
And honestly: no pet-food brand is behind PetKib. We don't sell food, so we have no reason to round your pet's dinner up.
One honest caveat: a calculator is a starting point, not veterinary advice. Pets with kidney disease, diabetes, pregnancy or any medical condition need a prescription plan from your vet — and every page here says so.
Three steps. Done.
1
Enter weight & age
kg or lbs — we handle both.
2
Add your food's energy
One number from the bag (kcal/kg).
3
Get the schedule
Grams, cups and meal times, ready to follow.
New — the care dashboard is live. And free.
Weight tracker with your breed's healthy range, the full vaccine & deworming timeline, and one-tap reminders in your phone calendar. Everything is free during early access — no account needed.