A comparison of high protein diet to the average commercial diet

Science diet
Ingredient
     % Calories per 100
grams of food
 Grams in a 500
calorie diet
 calories in a 50 gram
 protein diet
Total grams in food
in a 50 gram
protein diet
protein
   22     88
   26
   200
    50
Fat
   14   126
   17
   285
    32
Moisture
    8       0

    17
fiber
    4       0

      9
Minerals
    2       0
     2.4
      4
Carbohydrate    
 50   200
    61
   465
  112

100   
  414
  950 
  234 grams

EVO
Ingredient         
   % 
Calories per 100
grams  food
 Grams in a 500
calorie diet
 calories in a 50 gram
protein diet
Total grams in food
in a 50 gram
protein diet
Protein   43 
   172  
   50
   200
    50
Fat   22 
   198 
   26 
  230
    26
Moisture
    7.5
 


      8
Fiber
     2
    
      2
Minerals
   11
    
   13
    13
Carbohydrate 
  14.5
     58
    17
    70
    17
 
  100  
   428
  500
  116 grams

The Gaines guide to canine nutrition lists the protein requirement for dogs at 2.5 grams per pound.  Carnivores need most of their calories from protein and fat.

If you compare the protein in 500 calories of Science diet to the protein in 500 calories of EVO you will see that in Science Diet the amount of protein is only half of the needed 50 grams per day, but the carbohydrate  is quadruple that in EVO. 

 If a 20 lb dog requires 50 grams of protein daily, then to get this from Science Diet, he has to consume twice as much food, almost twice as many calories, and 600% more Carbohydrate.  

On a calorie basis, a dog which needs 500 calories a day will eat 121 grams of Science diet, and 116 grams of EVO.  But the  science diet dog will eat 17 grams of fat, 26 grams of protein, 61 grams of carbohydrate, and only 2.4 grams of minerals.  His diet, on a calorie basis, will be deficient in protein and mineral content.  The EVO dog will eat 50 grams of protein, 26 grams of fat, only 17 grams of carbohydrate, and 12 grams of minerals.  500 calories will satisfy his protein and mineral requirements. The Science Diet fed dog will have to eat 950 calories of Science Diet to get the protein and minerals he needs for good health.

A carnivore normally gets most of his calories from fat and protein, not carbohydrate.  I think it is fairly obvious which food more closely approximates a carnivore diet.  And it is also easy to see why dogs on a high carb diet are often obese.  The hi-carb diet which provides adequate protein and minerals, has double the calories needed, so that the dog given just enough of that diet to keep his weight normal, will be deficient in protein and minerals.

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