Calculating carbs in food

[wolf]

Hello,
I am looking for a new low carb dog food. I used the formula to start with 100 and deduct all the protein, fat, moisture, ash, fiber, etc. to arrive at the total carb %. I linked to a website showing breakdown of certain dog foods. Then I calculated the carb % for W/D canned, Core Wellness dry and canned, and Merrick's canned Country Kitchen. They all were low carb according to my calculation.
An example of my calculation for W/D canned for which I have an actual can.
The label states 4% protein, 78% moisture, 2% fat, 5% fiber, and 2% other. If I deduct 91% from 100 I arrive at 9% carb%. However, when I go onto the website linked from this forum under food the table states: 18% protein, 13% fat, 12% fiber and 53% carb % for W/D canned. Where is the difference? W/D looks like a low carb food using the can info, but is high carb according to the website. If I am calculating the info wrong please help me. I need to get this right to help select the right food.

Thank you,

Wolf

[peggy0]

Re: Calculating carbs in food

To compare dry and wet foods you must first subtract the water from the food. What remains is the dry matter: the, protein, fat, carbohydrate and ash. a dry matter analysis tells us the percentage of the dry matter (DM) that is protein, fat, and carbohydrate.

Formula 2: How to calculate carbohydrate percentage on a dry matter basis

Step 1. Calculate the total dry matter in the food.

* Subtract the percentage moisture from 100%.
* If a food is 75% moisture, it is 25% dry matter (100% – 75%)

Step 2: divide the listed macronutrient percentage by the dry matter percentage.

* Protein : 10%. divide 10% by 25% = 40% Protein
* Fat : 8%: divide 8% by 25% = 32 % fat

Step 3: Use formula 1 above and calculate carbohydrates

* (remember to subtract the ash)
* Carbohydrates = 100% - 40% (protein)-32% (fat) -6% (ash) = 22%

On your W/D canned it would be 100 minus 78 or 22. 5 divided by 22 is 23% fiber (good carbs) 4 divided by 22 is 18% protein, 2% fat is 9% and 2% other is 9. Subracting that all from 100% would be 59% leaving 41% carbs. Hope this helps

[eyelostit]

Re: Calculating carbs in food

I use Orijen food it really works for us, I tried just about every food over the years, also I am trying to think of the website about foods etc its a forum like this, I'll try to remember it for you.

Dolly & Niki