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Cattle Boards
Health & Nutrition
calves developing rumens
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<blockquote data-quote="Anonymous" data-source="post: 10372"><p>No, the rumen bypass happens every time a calf nurses. It is called "closure of the esophageal groove" and an indication of it is when the tail is wagging during nursing. This bypasses the rumen during nursing, since the milk is properly digested through the abomasum only. A ruminent will begin to digest food via the rumen starting at about one month but it really starts working well at about 12 weeks or more. For the first 24 hours, the gut can absorb antibodies via colostrum or other supplement (via man) but then the gut closes. This has nothing to do with rumination, since pigs are monogastrics and this occurs in them as well... I've seen calves sucking on grass and chewing it at one week, but that doesn't mean they're getting anything out of it.</p></blockquote><p></p>
[QUOTE="Anonymous, post: 10372"] No, the rumen bypass happens every time a calf nurses. It is called "closure of the esophageal groove" and an indication of it is when the tail is wagging during nursing. This bypasses the rumen during nursing, since the milk is properly digested through the abomasum only. A ruminent will begin to digest food via the rumen starting at about one month but it really starts working well at about 12 weeks or more. For the first 24 hours, the gut can absorb antibodies via colostrum or other supplement (via man) but then the gut closes. This has nothing to do with rumination, since pigs are monogastrics and this occurs in them as well... I've seen calves sucking on grass and chewing it at one week, but that doesn't mean they're getting anything out of it. [/QUOTE]
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