You are here:

Horses - Diet and Nutrition/soybean oil quantity in racehorse diets


hello ma'am. my boss, a thoroughbred trainer is getting confused how much amount of soybean oil to add in racehorse diets. he feeds 3kg oats in the morning and 4.5kg in the evening meal. feeds two times a day only since the stable staff wont be available after longer periods. could you please help me out?

Hello Caine,

Thank you for your question.  There is no set amount of any ingredient that a horse 'must' be fed. The decision to feed any particular ingredient, and what amount to feed it in, should be based on the horse's requirements.  Requirements are a function of the horse's size, workload and the rest of the diet.  To figure out how much you could feed, calculate the amount of energy the horse needs and how much it is getting from the rest of the ration.  Then feed enough oil to meet make up the difference between how much energy the horse needs and what it's getting.

There is, however, a recommendation to feed no more than 10% total fat (from all sources) in the diet. So if your horse weighs 1200 pounds and eats 2.5% of its body weight daily, the total diet should contain no more than 3lbs (or 1.36kg) of fat daily.  I hope that helps.


Horses - Diet and Nutrition

All Answers

Answers by Expert:

Ask Experts


Corlena Patterson


I can help with any of your horse nutrition questions and concerns. I have been involved with horses for closing on 40 years, with a B.Sc in Animal Science and currently working on an M.Sc in Equine Science with the University of Edinburgh. I have owned my own feed store, consulted professionally as an equine nutritionist, and lectured in the fields of equine and dairy nutrition at the University level for 5 years. I have developed and currently market 'Ration-X', a ration formulation program for horses...designed for the everyday horse owner. I am happy to help in any way I can.


Experienced in developing and implementing feed programs for horses of all disciplines, creating custom horse supplements and managing inter-disciplinary equine facilities. Specialize in equine nutrition consulting.

The American Society of Equine Appraisers

'Stable Management' Handbook, Equine Canada.

M.Sc (Equine Science-current), B.Sc(Agr) Animal Science, Equine Sports Massage Therapy Certification, Farrier Certification, Equine Consultant Certification, Certified Equine Appraiser, Certified in Emergency Equine Rescue.

©2017 All rights reserved.