Where does the '10% rule' come from?

The 10% guideline is widely cited by veterinary nutritionists and organizations such as VCA Animal Hospitals as a practical rule of thumb for keeping treats in proportion to a balanced diet. It reflects the principle that commercial treats are not nutritionally complete, so allowing them to make up a larger share of the diet risks creating nutritional gaps.

Does the 10% rule apply to cats too?

Yes -- the same 10% principle applies to cats. Cats have stricter essential nutrient requirements than dogs (they're obligate carnivores), making it even more important that the majority of their daily calories come from a nutritionally complete cat food rather than treats.

Are vegetables and fruit counted in the treat budget?

Yes -- any food outside your pet's regular balanced diet contributes to the treat budget, including pet-safe vegetables and fruit. The good news is most suitable vegetables (carrot sticks, green beans, cucumber) are very low in calories and rarely use more than a small fraction of the budget.

How accurate is the treat calculator?

The treat budget is as accurate as the MER estimate it's based on. Individual metabolic variation means the MER is an approximation -- the true maintenance calorie level for any individual pet can vary by 20% or more from the calculated value. Use the treat budget as a practical guideline and adjust based on your pet's actual weight trend over time.

How the Treat Calculator Works | PetCalculator

The Treat Calculator applies the veterinary '10% rule' to find the maximum daily treat calories that keep your pet's overall diet in balance. Here's the formula and how to use it.