In the fall, some owners and caretakers are faced with the onset of obvious foot pain in their horses for no apparent reason. What’s going on?

Dr. Eleanor Kellon, an established authority in equine Cushings and Insulin Resistance, says the vast majority of laminitis cases have a hormonal/endocrine root. “There is a peak in the spring, related to grazing young high sugar growths of grass. A second peak occurs in the fall, but the cause is more complicated.”

Grass undergoes a period of regrowth in the fall in some areas, but many cases of fall laminitis aren’t even on pasture. There is a natural rise in the hormone ACTH from late summer through end November in all horses. ACTH stimulates release of cortisol.

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