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Ask the Nutritionist: Dr. Getty's Forum for Equine Nutrition
Welcome to my forum. Feel free to post a comment or question. I will be happy to address your concerns regarding your horses' health. It may take as long as a week to get back to you, but I will respond to your question. Thank you for your patience.
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Kasey
 IP: 65.102.34.93 Feb 16, 08 - 9:58 PM |
Barley or Oats
I know some friends who are feeding their horses barley instead of oats. The reason is they say barley has a low glycemic index, higher in calories and thus a stabilized energy source. I can not find anything to back it accept a vet article on the holistic horse. Is this up to date true? Also, do you know if adding flax to oats would lower the glycemic index? 
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Dr. Getty
IP: 66.118.192.138 Feb 20th, 2008 - 4:51 PM |
Re: Barley or Oats
Hi Kasey, Yes, barley has a slightly lower glycemic index than oats, but oats are safer to feed than barley. This is because oats are more efficiently digested in the small intestine (the foregut) and very little ends up in the hind gut (unless fed in too high a quantity). If fed in a large amount (over 2 lbs at a time), then the oats won't get adequately digested in the foregut, and end up in the hindgut where the baceteria will ferment them and this can lead to laminitis. Barley, on the other hand, is not as efficiently digested in the foregut, and therefore, is more likely to end up in the hindgut -- thereby increasing the risk of laminitis. So, when feeding barley, be sure that it is crimped and steamed, and very little is fed. Speaking of grains -- many people feed corn and this is the most dangerous of all cereal grains because very little of it gets digested in the foregut. Most of it ends up being fermented by the bacterial flora living in the hindgut and this fermentation leads to the formation of acid, which kills the bacteria and sends endotoxins into the bloodstream. The result is laminitis. Thank you for asking this excellent question. The glycemic index is simply the ability to raise the blood glucose level, and hence, the insulin level. But, any cereal grain will have a significantly high glycemic index -- the variation between them is small. All the best, Dr. Getty 
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