Frequently Asked Questions
Is this calculator accurate?
It uses the same RER formula veterinarians use. That said, every dog is different. A husky pulling sleds needs way more than a pug watching Netflix. Use this as a starting point, then adjust based on your dog's body condition.
My dog is overweight. Should I feed the "obese" amount immediately?
No! Cut back gradually — about 10% per week. Sudden calorie drops mess with metabolism and your dog will act like you are starving them to death. Trust me, the guilt trips are real. Murphy gives me the saddest eyes when I reduce his portions, even by 20 kcal.
Do treats count toward daily calories?
Absolutely. Those "just one" treats add up fast. A medium milk bone is about 40 kcal. Give five a day? That is 200 kcal your dog does not need. Either subtract from meals or switch to low-cal options like carrot sticks. Scout would sell her soul for a carrot stick, so do not tell me your dog is too picky.
How do I know if my dog is the right weight?
Run your hands along their ribs. You should feel them easily, like piano keys under a thin blanket. If you need to dig, they are overweight. If ribs are visible, they are underweight. Simple as that. Your vet can also assign a body condition score from 1 to 9 — 4-5 is ideal for most breeds.
Can I use this for cats?
Technically no — cats have different metabolic needs. But honestly? The math is similar. Just know that cats are obligate carnivores and need way more protein. We might build a cat version if enough people ask. Though Scout would be deeply offended if I started calculating cat calories on her turf.
Where is my data stored?
Nowhere but your own browser. We use localStorage to save your calculator inputs and weight history, but that data never leaves your device. Clear your browser cache and it is gone. We cannot see it, access it, or sell it. We literally do not have a server for calculator data.
How often should I recalculate my dog's calories?
Monthly for puppies — they grow fast. Every 3-4 months for adults. Anytime you notice weight changes, activity level changes, or after spay/neuter surgery. I weigh Murphy and Scout every Sunday morning before breakfast. It takes 90 seconds and prevents surprises at the vet.
Why do spayed/neutered dogs need fewer calories?
Hormonal changes after spay/neuter reduce metabolic rate by about 25%. Most owners do not know this and keep feeding the same amount. The result? A chunky dog within 6 months. I did not learn this until my third year in the clinic, and I was mortified. Adjust portions within 2 weeks of surgery.