streakysox - 2017-03-21 9:51 AM The mineral that I use contain 36 ppm so 90 ppm is about three times as much so I would say it might e a little high. You do realize that ppm stands for parts per million?

winwillows - 2017-03-21 11:38 AM

It all depends on where in Montana you are located, and where your hay comes from. The western part of the state is selenium deficient. If you live there, or if your hay comes from there your horse may benefit from that product.

mtcanchazer - 2017-03-21 10:24 AM

 I went to the store yesterday to get some mineral/salt for my horses, and they didn't have what I wanted. So I got Redmond Selenium 90 instead, as it had the other minerals I was looking for, not realizing until reading last night what too much selenium could do to horses and selenium toxicity. It is a free choice loose mineral, but I'm wondering if I should be worried about them getting too much. I put a little out in a tub for them last night (maybe 1 cup worth, in the event it rained). I'm thinking about getting rid of it and ordering what I wanted in the first place.  
The mineral analysis is as follows:
Calcium minimum 0.35%
Calcium maximum 0.85%
Phosphorus minimum 0.02%
Salt minimum 88.0%
Salt maximum 93.0%
Magnesium minimum 0.06%
Potassium minium 0.03%
Sulphur minimum 0.07%
Zinc minimum 3500 ppm
Manganese minimum 2000 ppm
Iron minimum 600 ppm
Copper minimum 300 ppm
Iodine minimum 110 ppm
Cobalt minimum 50 ppm
Selenium minimum 90 ppm

Thanks in advance!