As is jalapeño-though according to psychologist Paul Rozin, Mexican dogs, unlike American dogs, enjoy a little heat. Rozin's work suggests animals have cultural food preferences too. Rozin was not the first academic to feed ethnic cuisine to research animals. In "The Effect of a Native Mexican Diet on Learning and Reasoning in White Rats," subjects were served chili con carne, boiled pinto beans, and black coffee. Their scores at maze-solving remained high, possibly because of an added impetus to find their way to a bathroom. In 1926, the Indian Research Fund Association compared rats who lived on chapatis and vegetables with rats fed a Western diet of tinned meat, white bread, jam, and tea. So repellent was the Western fare that the latter group preferred to eat their cage mates, three of them so completely that "little or nothing remained for post-mortem examination.
( Mary Roach )
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