We’re used to hearing precautions about feeding too much selenium, but most people know nothing more about it than too much of it can be toxic. Some know the horse needs it but not why or how much.Selenium is beneficial and necessary. It’s a potent antioxidant, protecting the horse’s muscle from damage caused by end products of energy generation. This is why selenium is especially important for horses in heavy work and those with a history of tying up.Selenium is also important for broodmares. Inadequate selenium intake in pregnant mares leads to a potentially
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