“Ash” on a cat food label is an analytical term for the inorganic mineral residue left after a laboratory test; it does not mean that fireplace ash has been added to the recipe.
Where the figure fits
Ash may appear with protein, fat, fibre and moisture under analytical constituents. Those figures describe broad components of the finished food. They are different from the ingredients list, which describes what was used to make it.
Do not turn one percentage into a quality score
Minerals are essential nutrients, but the ash percentage alone does not reveal whether every mineral is present in an appropriate amount or balance. It also does not tell you whether a food is suitable for a cat with a diagnosed urinary, kidney or other condition.
A better label check
- Confirm that the product is a complete food for the correct life stage.
- Read the feeding guide and calorie information where supplied.
- Compare products on the same basis before comparing percentages.
- Ask the manufacturer for clarification when the declaration is unclear.
For a cat needing a therapeutic or restricted diet, follow veterinary advice rather than selecting by ash alone. See Cats Protection’s general feeding guide and our guide to comparing wet and dry food on a dry-matter basis.
