# Origin of cud chewing

**URL:** <https://boards.straightdope.com/t/origin-of-cud-chewing/379098>\
**Category:** Factual Questions\
**Created:** [November 4, 2006, 4:19pm UTC](https://boards.straightdope.com/t/origin-of-cud-chewing/379098 "2006-11-04T16:19:40Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Gymnopithys](https://avatars.discourse-cdn.com/v4/letter/g/fbc32d/32.png) [@Gymnopithys](https://boards.straightdope.com/u/Gymnopithys)\
**Post date:** [November 4, 2006, 4:19pm UTC](https://boards.straightdope.com/t/origin-of-cud-chewing/379098/1 "2006-11-04T16:19:40Z")

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I realize that evolutionary questions may be difficult to answer. But I wonder how ruminating evolved from simple eating \> mouth \>\> stomach, which appears to be the ancestral way, and back to mouth ?

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**Author:** ![scm1001](https://avatars.discourse-cdn.com/v4/letter/s/c4cdca/32.png) [@scm1001](https://boards.straightdope.com/u/scm1001)\
**Post date:** [November 5, 2006, 12:02am UTC](https://boards.straightdope.com/t/origin-of-cud-chewing/379098/2 "2006-11-05T00:02:53Z")

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regurgitating food is quite common in animals, for instance to feed the young in birds and dogs. So one way trips through the alimentary system is not always the norm.

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**Author:** ![FRDE](https://avatars.discourse-cdn.com/v4/letter/f/e68b1a/32.png) [@FRDE](https://boards.straightdope.com/u/FRDE)\
**Post date:** [November 5, 2006, 8:41am UTC](https://boards.straightdope.com/t/origin-of-cud-chewing/379098/3 "2006-11-05T08:41:12Z")

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The dog returns to its vomit.

Just a storage and transportation solution.