I really believe in the Trifecta product. Might you suggest a safe “complete ” pellet food source to use in concert with Trifecta. A pelleted food source that keeps the selenium levels safe for a 21 active horse who events at a low level. My horse has access to a low protein hay ad lib , as well as pasture grass for 6-8 hours per day in Pullman WA. Pasture and hay are from same source. Both low protein but plentiful. Previously my horse was on a non-vitamin pelleted food source for grass based hay in western WA. Thus, Trifecta was not providing too much selenium, but great supplement support. The Western WA facility offered hay with a higher protein content. Trying to keep using Trifecta without over doing the selenium or anything else I should be aware of in his Eastern WA home is important to me. Pellet Options in new Eastern WA facility are open, but the majority of the horses are on Purina Strategy or Purina Senior or Purina Ultium.
Answer from Equine Nutritionist, Del Johnson:
Thanks for the question. Selenium is toxic at levels of 30 mg per day for a 1000 lb. horse. Trifecta provides 3 mg per day so there is a lot of safety in combining other feed ingredients. Most feed products are formulated at 1 mg per day if you are feeding the highest feed recommendation. Typically you don’t need to worry about a toxic level when you are adding forage and grain….and even salt that contains selenium. I suggest that you find a forage source to complement the pasture and add enough simple grain to keep the body condition that you desire. We vary the quality of the forage to keep body condition and feed very little grain, just enough to combine with the Trifecta. If you use a Purina product as the grain source just use enough so that you can top dress with Trifecta because Trifecta provides all vitamins and trace minerals required.