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In the Northeastern US, all of the cool season grasses will accumulate fructans and sugars under certain environmental conditions.
Implement a good rotational grazing system on your farm to avoid overgrazing. The greatest amount of sugar in a grass plant is in the bottom three inches, so rotate pastures before they are grazed below three inches. Shady pastures and cloudy days will result in lower carbohydrates and sugar levels in grasses. Or move high risk horses to shady pastures.
Restricting access to only the early morning hours during the summer and keeping at-risk horses off pasture or keeping off a day or two after mowing, if there is a drought or after an overnight freeze should help reduce the risks.
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