Feeding directions on a bag are a starting point, not a guarantee. Dogs of the same weight can need different amounts because age, activity, neuter status and body condition all change energy needs.
What to keep in mind
A practical approach is to estimate resting energy requirement, apply a life-stage factor, then convert calories into the cups or grams of the exact food you use. Recheck body condition every few weeks and adjust with your veterinarian when needed.
Practical next step
Treats and extras matter too. A common rule of thumb is to keep treats to no more than about ten percent of daily calories so the main diet can provide most essential nutrients.
Try the related calculator
Use the calculator to organize your numbers, then apply the context explained above.
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