04-30-2013, 12:25 PM
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#14 |
Donating YT 1000 Club Member
Join Date: May 2012 Location: Garner, NC
Posts: 1,485
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Originally Posted by Nancy1999 I found something that might be helpful.
The levels of nutrients in the table below are expressed on a 'dry matter' (DM) basis. On most pet food labels, the levels listed in the guaranteed analysis are expressed on an 'as fed' basis. To convert 'as fed' to 'dry matter' a simple conversion is necessary. If a dry food has 10% moisture we know that it has 90% dry matter. So we look at the label and check the protein level. That reads 20%. Next, we divide the 20 percent protein by the 90% dry matter and we get 22%, which is the amount of protein on a dry matter basis. Does this make sense so far? Good. Now let us compare this to canned food that has 80% moisture. We know that with 80% moisture we have 20% dry matter. The label shows 5% protein. So we take the 5% and divide it by 20% and we get 25% protein on a dry matter basis. So the canned food has more protein per pound on a dry matter basis after all the water is taken out. We can do the same for fat, fiber, etc. Dog Food Standards by the AAFCO
In other words, if it has 80% moisture and 5% protein, you get a total protein of 25%, since this has an even higher amount of protein it would be higher than 25% around 40%, if the moisture was 80%, less if it was lower. These all have varying amounts of moisture. | |
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