Ask the Nutritionist: Dr. Getty's Forum for Equine Nutrition
Welcome to my forum.
Here you will find more than 6 years of questions and my answers. It is searchable and offers a great deal of information.
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Dr. Getty
Hi Joy,
A horse needs between 1 and 3 mg of selenium per day.
The Ultium has approximately .55 ppm of selenium added. So, 2 lbs of Ultium will provide approximately .5 mg of selenium (2 lbs is equivalent to 908,000 mg. 908,000 X .55 divided by 1,000,000, gives you approximately .5 mg of selenium).
If you feed ½ ounce of your supplement, you’ll increase the total amount of Se to approximately 1.5 mg (your supplement has 1 mg per ½ ounce, not 1 gram). This is fine and perfectly safe.
The overall concentration of the diet that consists of 2 lbs of Ultium, plus forages, and the supplement will be well within the safe range of .1 to .3 ppm. To get an exact amount of selenium would require knowing the selenium content of everything you are feeding, and then adding them together.
Dr. Getty
