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Veterinarian Neils C. Pederson, author of Feline Husbandry, believes that purring is initiated from within the central nervous system and is a voluntary act. In other words, cats purr only when they want to. Purring is an integral part of the feline communication system and occurs for a variety of reasons.
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www.petplace.com/cats/why-do-cats-purr/page1.aspx
www.petplace.com/cats/why-do-cats-purr/page1.aspx
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One of the top items of curiosity about cats is 'why do they purr?' Although there is no definitive answer why cats purr, it is a remarkable ability shared by no other animal, except certain big cats and the raccoon. ... Why and How do Cats Purr?
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cats.about.com/cs/catmanagement101/a/why_cats_purr.htm
cats.about.com/cs/catmanagement101/a/why_cats_purr.htm
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Indications are that cats don't purr only when they are content and happy. They also purr during tense moments, or even through trauma. When suddenly and violently injured, even near death, a cat will often purr. It has been suggested that ...
http://wiki.answers.com/Q/Why_do_cats_purr
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Purr - Wikipedia, the free encyclopedia
A purr is a sound made by all species of felids and is a part of cat communication. It varies between cats (for example by loudness and tone), and from species to species, but can be characterized a...
en.wikipedia.org/wiki/Purr
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All domestic cats are born with the purring ability. Kittens instinctively purr when nursing, and your adult cat will purr at the drop of a hat whenever you're near. Cat purrs will range from a deep rumble to a raspy, broken sound, to a high-pitched trill, depending on the physiology and/or the mood of a cat. ... Why Cats Purr...
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cats.about.com/cs/catmanagement101/a/how_cat_work_3.htm
cats.about.com/cs/catmanagement101/a/how_cat_work_3.htm
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"No one knows, really, how cats purr. Although you are correct, it is believed to be the vibration of blood vessels rather than something vibrating in the cat's larynx. Cats are all allegedly supposed to have the ability to purr, but I...
http://answers.yahoo.com/question/index?qid=20090705174...
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No one knows for sure why a domestic cat purrs, but many people interpret the sound as one of contentment. Our understanding of how a domestic cat purrs is becoming more complete; most scientists agree that the larynx (voice box), laryngeal...
http://www.loc.gov/rr/scitech/mysteries/catspurr.html
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As with many behaviors in dogs and cats, the original presumed purpose of the behavior may not be directly relevant in a pet home. But we do believe that, when our healthy pet cats purr, they are happy and at peace.
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www.coolquiz.com/trivia/explain/docs/cats.asp
www.coolquiz.com/trivia/explain/docs/cats.asp
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Re: How Does A Cat Purr, Which Cats Purr, and What Does It Mean? Area: Zoology ; Posted By: Kelleen Flaherty, Staff, Biology; Date: Wed Apr 10 16:26:34 1996 ... No one knows, really, how cats purr. Although you are correct, it is believed to be the vibration of blood vessels rather than something vibrating in the cat...
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www.madsci.org/posts/archives/may96/828639116.Zo.r.html
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