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Omega 3 Fatty Acid Use in Allergic Horses

Date Published: 02/18/2005
Date Reviewed/Revised: 07/18/2016

When the weather is warm, the number of flying insects increases and many horses are allergic to their bites.  Horses that are allergic to insect bites have a significant reaction that causes them to scratch and rub their skin, and they are very uncomfortable.  Some will do enough damage to lose hair and even develop severe skin infections. All of this is commonly called sweat itch.  The lesions commonly occur on the midline of the horse’s belly but can occur over the back as well as the main and tail areas.  Treatment requires insect control, sometimes cortisone to decrease the allergic response, and antibiotics if there is an infection.  However, cortisone can only be used short term as it can lead to founder, so it is not a good option in the long term. 

Another option for the allergy may be omega 3 fatty acid supplementation.  This therapy is used in dogs for allergy and researchers at the University of Guelph indicated they tested horses using flaxseed, which is a good source of omega 3 fatty acids.  Horses were fed flax meal daily for six weeks. Then some of them were injected with Culicoides extract, which is one of the flies typically involved with the syndrome.  The horses that were fed the flax meal had a significant reduction in skin reaction compared to horses that were not given the flax.  So if your horse has skin allergies to flying insects, feeding omega 3 fatty acids may help.  The only concern I have about the study is that the horses used were not reported to be allergic to flying insects so although the itching decreased, i do not know if feeding flax seed will make a significant difference in itching horses but it is worth a try. 



 
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