Abstract
Pigeons were trained to peck a key to obtain intermittent access to food, and the effects of various concentrations of halothane on the steady rate of key pecking generated by the schedule of food presentation were determined. Concentrations of halothane as low as 0.1% decreased the rate of key pecking. Higher concentrations of halothane caused greater decreases in the rate of key pecking. Increases in the rate of key pecking were not observed during halothane administration under several schedules of food presentation. The effects of halothane also were determined on the gross behavior of the pigeon using a blind technique. Although only the presence or absence of changes in the gross behavior were recorded, these data were useful in interpreting the effects of halothane on key pecking.
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