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Old 10-06-2008, 07:26 PM
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Figuring the protein based on the percentage in the food is the wrong approach. You need to figure how many grams of protein your dog is getting per day, not look at the percentage that is in the food.
A dog needs 1 gram of protein per pound of body weight per day (Ohio State Univ. College of Vet. Med., Nutrition Studies).
If your dog weighs 70 pounds and gets 350 grams of food in a day, assuming the protein is about 75% digestible (they range from about 70%-80%, Department of Biochemistry, Physiology and Nutrition, Norwegian School of Veterinary Science, N-0033 Oslo, Norway and Department of Basic Sciences and Aquatic Medicine, Agricultural University of Norway, N-1432 Ås, Norway) and the food contains 28% protein, your dog is getting about 74 grams of protein in a day, which is quite adequate for their requirements. In contrast, the same dog getting 250 grams of a 33% protein food (often you feed less of the high protein foods due to the calorie density) is getting about 62 grams of protein in a day, and is protein deficient.
Yet another way in which the dog food industry uses marketing to convince people that their food is "better" without anyone realizing the science behind the hype.
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Old 10-06-2008, 07:48 PM
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Wow! Thank you. I'll go do the math.

I've got to do this one step at a time...1 cup =8 oz = 225 grams. Oh how I love math...LOL
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Old 10-06-2008, 08:00 PM
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Quote:
Originally Posted by Kimm View Post
Wow! Thank you. I'll go do the math.

Let us know what your math tells you.... sounds very logical but right now it just makes my head hurt !!
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Old 10-06-2008, 08:07 PM
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Quote:
Originally Posted by Penny & Maggie's Mom View Post
Let us know what your math tells you.... sounds very logical but right now it just makes my head hurt !!
I'll get it. It takes me longer than some, but I'll get it! If this is like when I figured out how many calories Tucker needed to maintain a certain weight, it will really help! The math was easier with that though. You can't really mess up with 10 calories per pound.
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Old 10-06-2008, 08:30 PM
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First issue I'm having is converting cups to grams, since you are converting a volume to a weight. From all I see googling, 1 cup of various foods have differing gram amount. The standard they mention is 230 g = 1 cup, but it varied a tremendous amount. Anyone have any ideas????
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Old 10-06-2008, 08:39 PM
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LOL, I showed it to DH and he gave me the wrong formula! It didn't add up. I'll give it to one of our grad students. Common sense tells me that both of mine are getting enough protein...I hope. I'll go sleep on it!!!

I have a food scale, so I can weigh mine.
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Old 10-06-2008, 08:50 PM
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Ok here is my initial conversion.. I took Cody, who weighs 58 lbs and gets 1 1/2 cups of EP Hol Duck. I'm using the standard of 230 g= 1 cup ( I'm not at all sure that is a correct value). SO....1 1/2 cups food = 345 grams, multiplied by 75% digestibility= 258.75, multiplied by 23% ( the amount of protein in the EP Duck) = 59.5 Pretty darn close. I want to look further into the digestibility of this food ( I know that great dane lady had something on her site) and would like some input about how dog food would be converted to grams. However, it does make me think that this would def. put the high protein foods WAY over the limit. (Cody would never get them anyway for other health issues)
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Old 10-06-2008, 09:04 PM
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I just weighed Cody's 1 1/2 cups of the Eagle Pack and it was 175 g ..... anyone else doing any weighing. When I use that in the equation, it shows that all of mine are on the appropraite amount and protein level. Cody ( 58 lb springer) is getting 1 1/2 c of the 23% Eagle Pack Hol Duck; the golden girls are getting 2 c of the Innova Large Breed Adult ( 26.4 % protein) which comes out to 69.3 grams..... and they are within 5 lbs of that. I'm feeling good about their diet right now.
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Old 10-06-2008, 11:01 PM
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I have my 2 boys on Wellness Core Ocean. They have been on it for about 4 months now with no problems. Of course with any kind of fish formula it doesn't smell wonderfully but I like the fact that fish is a great source of protein, and the fiber is high too.
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Old 10-06-2008, 11:42 PM
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ONCE YOU FINISH CALCULATING THE PROTEIN ...
MAKE SURE YOU SEND A SAMPLE OF THE FOOD TO THE LAB ...

" A pet food manufacturer made a mock product that had a guaranteed analysis of 10% protein, 6.5% fat, 2.4% fiber, and 68% moisture, similar to what you see on many canned pet food labels. The only problem, was that the ingredients were old leather work boots, used motor oil, crushed coal, and water! "

http://www.peteducation.com/article....&articleid=668
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