Dry Matter Formula:
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Dry matter calculation determines the actual nutrient content of dog food by removing the moisture component. This allows for accurate comparison between different dog foods with varying moisture levels.
The calculator uses the dry matter formula:
Where:
Explanation: The equation converts the "as fed" percentage to a moisture-free basis, allowing for direct comparison between foods with different moisture contents.
Details: Comparing dog foods on a dry matter basis is essential because moisture content varies widely between wet and dry foods, which can make nutrient percentages misleading when compared directly.
Tips: Enter the nutrient percentage as listed on the food label (as fed) and the moisture content percentage. Both values must be between 0-100%, and moisture must be less than 100%.
Q1: Why is dry matter important in dog food?
A: Dry matter basis allows for accurate comparison of nutrient content between different types of dog food (wet vs. dry) by removing the variable of moisture content.
Q2: How do I find the moisture content of my dog's food?
A: Check the guaranteed analysis on the food packaging - moisture content is required to be listed.
Q3: What's a typical moisture percentage for dog foods?
A: Dry foods typically contain 10-12% moisture, while wet foods contain 70-85% moisture.
Q4: Should I use dry matter basis for all nutrient comparisons?
A: Yes, especially when comparing different food types or brands. The only exception is when comparing the same formulation.
Q5: Does dry matter calculation affect calorie content?
A: Yes, removing moisture concentrates the calories. Wet food often appears lower in calories until converted to dry matter basis.