Values in the guaranteed analysis are expressed as either minimum or maximum. A maximum guarantee (% max) means at most this specific amount of the nutrient is included in the formula. A minimum guarantee (% min) means at least this specific amount of the nutrient is included in the formula. The following four nutrients must be included on all pet food labels:
- Crude Protein (% min)
- Crude Fiber (% max)
- Crude Fat (% max)
- Moisture (% max)
For example, a cat food with a 25% minimum crude protein guarantee should contain at least 25% protein, but could contain much more. The only way to determine the actual amount is by laboratory analysis.
Other information may be guaranteed on cat food products, such as magnesium (% max), taurine (% min), ash (% max), and linoleic acid (% min).
- The guaranteed analysis is an important tool when beginning to compare cat food formulas, but it doesn't provide meaningful nutritional information. Using information on the energy content and nutrient density of a food is the only way to properly compare cat foods. This information is available from the manufacturer.