Malatya Haber Added fat improves behavior
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Added fat improves behavior

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By Juliet M. Getty, Ph.D.

Diet affects behavior. This makes sense. A well-fed horse is healthy. And a healthy horse feels good. Conversely, a poorly-nourished horse is suffering. A variation in hormone levels, for example, can have a temporary effect on how the horse sees the world. Just as reaction to sugar intake varies in humans, so it does in horses. Horses may feel ill or "off" from an overindulgence in sugar/starch, and they certainly have been reported to exhibit "sugar highs and lows" caused by the sudden surge and subsequent drop in blood glucose from a high carbohydrate (sugar/ starch) meal. Although there is, in fact, little scientific evidence that proves a sugar/starch-driven behavioral component, many horse owners will attest to their own horses showing adverse behavioral responses and will therefore avoid feeding anything that contains starchy cereal grains or is sweetened with molasses.

There are plenty of good reasons beyond the scope of this article to avoid high sugar/high starch diets, but in terms of behavior, what alternative does a horse owner have if the horse simply needs more calories? Hay and grass simply cannot provide enough energy (calories) to support the additional requirements created by exercise, work, and performing. The answer is fat.

Gram for gram, fat provides more than double the calories of carbohydrates or protein. And it is well digested. But there's an added bonus. Fat has a calming effect on horses' behavior.

Researchers at Virginia Polytechnic Institute noticed that horses fed a high fat diet are less reactive to startling stimuli and had lower levels of excitability and anxiety than horses fed a more traditional grain-based diet. The horses in their experiment received 15 percent of the total calories from fat, which is high for most horses. However, the study reveals that fat is worth trying if you have a sensitive horse who may become easily excited by everyday activities. (Please note: Ponies, minis, donkeys, and mules should not receive high fat diets.)

What type of fat?

All fat has the same number of calories, regardless of the source. But from a health perspective, it is best to steer clear of animal fats, as well as oils that are have too many omega 6s (which increase inflammation) in relation to omega 3s (which have an anti-inflammatory effect). Oils high in monounsaturated fatty acids are a good source since they neither increase nor decrease inflammation.

Below are some commonly fed oils:

--Flaxseed oil: Has a 4:1 ratio of omega 3s to omega 6s, making it an ideal choice

--Canola oil: 10 percent omega 3s and relatively low in omega 6s. Also contains monounsaturated fatty acids (no harmful impact on inflammation)

--Rice bran oil: Only 1 percent omega 3s but low in omega 6s and high in monounsaturated fatty acids

--Soy lecithin: Only 4 percent omega 3s but also contains choline, a helpful component of neurotransmitters

--Soybean oil: Only 7 percent omega 3s and mostly omega 6s (less desirable choice)

--Corn oil: No omega 3s and higher in omega 6s than soybean oil (poorest choice)

How much?

I prefer to limit fat intake to no more than 10 percent of the total calories, though some athletes are fed levels as high as 20 percent. For the lightly exercised, mature 1,100 pound (500 kg) horse, the National Research Council recommends a minimum total diet of 20 Mcals per day to maintain body condition. Ten percent would be 2 Mcals per day from fat. One cup (8 fluid ounces or 240 ml) of oil will meet this requirement. It weighs 240 grams and at 9 kcals/g, provides 2.16 Mcals.

How to add?

When adding any amount of oil to your horse's feed, start with a small amount (say, one tablespoon or 15 ml). Most horses do not like oily feed, but more important, it takes several weeks for the horse's cells to become accustomed to metabolizing more fat.

Summary

Short attention span, spookiness, reluctance to work, excessive sensitivity and alertness to surroundings, irritability, and "hot" behaviors can be reduced by adding fat to the diet. Fat is high in calories, so limit the amount you feed based on the horse's weight and his caloric need. Omega 3s need to be in balance with omega 6s, so choose oils carefully. And finally, build up to desired intake by starting slowly and increasing over 4 to 6 weeks.

Juliet M. Getty, Ph.D. is an internationally respected equine nutritionist available for private consultations and speaking engagements. At www.gettyequinenutrition.com, sign-up for her informative--and free--monthly newsletter, Forage for Thought, read articles, search her nutrition forum, enroll in upcoming teleseminars and purchase previously recorded events. Contact Dr. Getty directly at gettyequinenutrition@gmail.com.

Date: 1/7/2013



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