SOME FACTORS AFFECTING THE FOOD INTAKE OF NORMAL DOGS AND DOGS WITH ESOPHAGOSTOMY AND GASTRIC FISTULA

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Abstract
In intact dogs, ingestion of a part of a meal 20 min, before the ad lib. offering of the same food decreases the oral intake by an approx. equivalent amt. In gastrostomized dogs, introduction of food into the stomach just before offering the regular oral meal decreases oral intake by an approx. equivalent amt. Inert material (Karaya gum) is just as effective as food in producing inhibition, indicating that the effect is a mechanical one due to distention. If the intra-gastric feeding is given several hrs. before oral feeding, no decrease in oral intake occurs. In esophagostomized dogs, sham feeding greatly exceeds food deficit. The placing of food into the stomach a few min. or a few hrs. before does not inhibit sham feeding. The placing of food into the stomach during sham feeding inhibits to some extent. Apparently, the factor of gastric distention can operate to reduce food intake only when it occurs simultaneously with oral ingestion. Both oral and gastric factors operate to regulate food intake during a meal.

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