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Protein, of course, is necessary because it repairs muscles, but fat releases the most energy per ounce, and for that reason should be the kind of food chosen for the long races. Here, for example, are two grains: peanuts and maize. Suppose a pigeon eats 25 grams (a little less than I oz.) of either one. Which would supply the most energy?
Peanuts with 30 per cent protein, U .6 per cent carbohydrates, 47.5 per cent fat.
Maize with 9.3 per cent protein, 70.3 per cent carbohydrates, 4.3 per cent fat.
One hundred grams of peanuts would have 41-6 grams of protein and carbohydrate combined:
41-6 x 4 = 166-4 calories
Fat 47-5 x 9 = 427-5 calories
Total 539.9 calories
One hundred grams of maize would have 79-6 grams of protein and carbohydrate combined:
79-6 x 4 = 318-4 calories
Fat 4-3 X 9 = 38-7 calories
Total 357 1 calories
Thus, a cropfull of peanuts would supply our 500-mile flier with 563-9 units of energy vs. 357-1 in a cropfull of maize.
This is not to say that peanuts make the ideal racing food. There may be reasons why they are not, but the comparison indicates that we can, by thought and action, help our birds sustain themselves by what we feed them. Perhaps mixtures of high fat foods are the answer. For one day's racing we need not be concerned with vitamins, amino acids and other essentials. Racing takes energy and the essentials beyond that can be supplied before and after the race.
In long-distance races the food in the bird's crop is that fed them in the baskets. What is fed in the last meal in the loft before the pigeons are basketed will last no more than overnight. Therefore, the food fed the pigeons in the basket must be food which all the birds have been trained to eat, and thus no one has an advantage from his study of nutrition, unless he can find a way of feeding which will load his birds with stored nutrients.
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