Purina® Omolene® #400 RT Complete Advantage® Horse Feed

Purina® Omolene® #400 RT Complete Advantage® Horse Feed

Provide your equine athlete with a feed formulated for their unique nutrient and energy needs. Purina® Omolene® 400 Complete Advantage® RT horse feed is a nutritionally balanced horse feed designed to be fed with hay and/or pasture. This calorie-dense feed is formulated with multiple fuel sources to support sustained performance and with Outlast® technology to support gastric health and Amplify® High-Fat Nugget to support body condition, endurance, and bloom. Formulated with low dust ingredients, this feed is designed for horses with respiratory or dietary sensitivity and does not contains barley, oats, or alfalfa. Feed with full confidence knowing only the best innovations proven in performance earn their place in Purina® Omolene® horse feeds.

Features & Benefits

Multiple Fuel Sources

A calorie-dense blend of fat, fiber and whole grains supports sustained performance

Outlast® Gastric Support 

Scientifically shown to support gastric health and comfort and proper pH even through the stress of travel and competition

Amplify® High Fat Nugget

A proprietary blend of fatty acids from vegetable oils, flaxseed and rice bran that supports body condition, endurance and bloom

Low Dust Ingredients

Designed for horses with respiratory or dietary sensitivity, this formula contains no barley, oats or alfalfa

Loose Beet Pulp Shreds

An excellent source of fermentable fiber for sustained energy

Balanced Nutrition

Designed to be fed with hay and/or pasture, this formula provides 100% of the required vitamins and minerals when fed as directed.*
*When fed as directed, with free-choice or added salt, based on Nutrient Requirements of Horses. Sixth Revised Edition – 2007, published by the National Research Council


Min / Max
Crude Protein
12.00 %
0.50 %
8.00 %
Crude Fiber
16.00 %
Acid Detergent Fiber (ADF)
19.00 %
Neutral Detergent Fiber (NDF)
31.00 %
Calcium (Ca)
0.80 %
Calcium (Ca)
1.30 %
Phosphorus (P)
0.40 %
Copper (Cu)
35.00 PPM
Selenium (Se)
0.30 PPM
Zinc (Zn)
140.00 PPM
Vitamin A
3,000 IU/LB
Vitamin E
100 IU/LB

Feeding Directions

FEEDING DIRECTIONS WITH HAY OR PASTURE:  Start with the amounts of Omolene® 400 COMPLETE ADVANTAGE® RT given for the weight and lifestyle of the horse. After observing the horse for a period of time, the amount fed may be gradually increased or decreased to obtain the desired body condition and weight.
For feeding directions outside the ranges addressed in these feeding charts, please contact your local Purina® retailer or Purina Customer Service at 800-227-8941.
  800 1000 1200
Minimum hay or
Equivalent pasture* (lbs/day)
9.50 12.00 14.50
Omolene® 400 RT Horse Feed (lbs/day)**
Moderate Work    6.25 7.75 9.25
Heavy Work       8.00 9.75 11.00***
*This is the recommended minimum amount of hay to be fed. If feeding more hay, you may reduce the feeding rate of Omolene® 400 RT to maintain appropriate body condition.
** To meet nutrient requirements, do not feed less than 0.4 lbs per 100 lbs of body weight per day for mature horses (4 lbs per 1000-lb horse). If your horse gains too much weight at that minimum feeding rate, transition to Purina® Enrich Plus® Ration Balancing Feed. 
***Feeding rates of Omolene® 400 RT and forage may be adjusted or feed may be top-dressed with Purina® Amplify® High-Fat Supplement for additional calories.  Hard-working horses may also benefit from supplementation with Purina® Supersport® Amino Acid Supplement.
Changing To
  • Make the feed change gradually over a period of 7 to 10 days.
  • Changes in the rate of feeding should not exceed 1 pound per day for each horse.
  • Mix the new feed with the old, gradually increasing the amount of the new feed while decreasing an equal amount of the old.
Store in a dry, well-ventilated area protected from rodents and insects. Do not feed moldy or insect-infested feed to animals as it may cause illness, performance loss or death. 
  1. Feeding rates will vary with size, age, temperament, health status, forage quality, climate and activity level.  Feed at regular times, at least twice daily.  Do not feed more than 0.5 lbs/100 lbs of body weight per meal.  Do not feed free-choice. Prevent rapid eating by the horse of any feedstuff.
  2. Reduce and/or delay feeding a horse which is hot, excited or showing pain, has fever or diarrhea.  Consult your veterinarian if any problems arise.
  3. Always feed a minimum of 1.0 to 1.2 lbs per 100 lbs of body weight of good quality, clean hay or the equivalent in pasture.
  4. Any feed changes should be made gradually over a period of 7 to 10 days.  Changes in the rate of feeding should not exceed 1.0 lb per day for each horse.
  5. Provide fresh, clean water at all times.  Provide your horse with access to salt. 
Consult with your veterinarian regularly and maintain a routine dental, parasite control and health care program for your horse.