Start with suitability
Check which life stage the food is intended for and whether it is described as a complete food or a complementary product in your market. A front-of-pack ingredient story is not a substitute for nutritional suitability.
Find the energy value
Locate calories per kilogram, per can or per serving. Convert carefully and measure actual portions. Cups and scoops vary; a kitchen scale helps make repeated servings more consistent. The portion calculator converts a calorie target you already have.
Compare moisture fairly
Wet and dry foods contain different amounts of water. Dry-matter conversion can help compare a listed nutrient percentage, but guaranteed values may be minima or maxima. Such a comparison does not measure digestibility or determine the best diet.
Keep the individual in view
Discuss diet choices with your veterinarian when a cat is growing, pregnant, ill or managing weight. Include treats and extras in the daily picture. Do not change a prescribed diet solely because an online comparison ranks another product higher.
A useful next step
Choose one manageable improvement and make a note of what changes. Use the practical tools to organize the details, and return to the discussion to share what you learned.