Why does my pet food's weight not match its measured cup volume?

Question

The back of my pet food says the weight in grams per cup of food. I notice when I weigh the food for 1/3 cup it only fills the measuring cup about 3/4 full. Is this normal? also do you know if pet food companies measure the calories per cup based on weighed grams of food or just by standard 8 oz. measuring cups? Thanks!

Joy Fuhrman, DVM, MBA, CPA · Accepted Answer

Dry pet foods come in a variety of shapes and sizes. Accordingly, the weight of one diet that fills a cup may not be the same as the weight of a cup of another diet. If you are purchasing a high quality pet food brand such as Science Diet, Royal Canin or Purina, to name a few, these diets are usually very well tested for weight and calories per cup. If you have any concerns, you can always speak to your veterinarian and request a diet-specific measuring cup with which to feed your pet. You can also call the toll-free number for the pet food manufacturer if you have any questions or concerns about their product.

Why does my pet food's weight not match its measured cup volume?

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