Dark Knight
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NEW YORK A cat's purr normally says, "I'm happy." But a new study suggests some purrs send cat owners a much different message: "Feed me!"
Researchers found that purrs of hungry cats included a higher-pitched sound, somewhat like a cry or meow. They played recordings of these purrs from 10 cats to 50 human volunteers. Even people who'd never owned a cat found them to be more urgent and less pleasant than contented purrs from the same animals.
http://news.yahoo.com/s/ap/20090714/ap_on_sc/us_sci_purrsonal_message
Researchers found that purrs of hungry cats included a higher-pitched sound, somewhat like a cry or meow. They played recordings of these purrs from 10 cats to 50 human volunteers. Even people who'd never owned a cat found them to be more urgent and less pleasant than contented purrs from the same animals.
http://news.yahoo.com/s/ap/20090714/ap_on_sc/us_sci_purrsonal_message