Karenchol
Well-Known Member
Absolutely. I wish I’d known 7yrs ago what I’ve learnt in the last few days. Or met you!!!There are 2 common problems .....
Firstly, because of the narrow safety margin of Selenium, very few feed/supplement companies will recommend or include ,more than about 1mg in their products, in case there are other sources in the diet. A horse in medium to hard work can require around 3mg/day....so depending on the hay/grass/other parts of the diet, some may become deficient, but others may have plenty.
Secondly : there are some horses who simply don't absorb/utilise things such as vit E/selenium, and thus need more....it is individual.
Eg I had two horses...on the same diet/hay/grass and workload....one was selenium deficient....he responded well to supplementation at 3mg/day...his vitamin e levels were fine
...the other horse had a normal selenium level, but was very deficient in Vit E, the only form of which he could utilise being Nano-E.
Both horses had regular blood tests to ensure supplementation levels were correct.