HOW TO CONVERT FOOD VALUES FROM "AS FED" TO "DRY MATTER":

First, find the "Guaranteed Analysis" on the label of the food. It should look like this:

Crude Protein (min) 7.5%
Crude Fat (min) 4%
Crude Fiber (max) 2%
Moisture (max) 76%

The Moisture content is 76%. Subtracting from 100%, that means that there is 24% dry matter (the actual food). In other words, this can of puppy food is 76% water and 24% actual nutrients.

To convert the Guaranteed Analysis numbers to dry matter basis, simply divide them by the percentage of the diet that is dry matter:

Crude Protein: 7.5 divided by 24 = 0.31 or 31%
Crude Fat: 4 divided by 24 = 0.166 or 16.6%
Cruge Fiber: 2 divided by 24 =0.08 or 8%

Foods can only truly be compared by converting to dry matter basis.

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Page posted: 2/15/2018