I am having difficulty with recurring laminitis with my horses. Where do I...
All rapidly growing plants have a high sugar content. The plant's sugar content is influenced by the time of day, stress level of the plant and maturity of the plant. If the grass is quite mature, the sugar content will be lower; however, if the plant is closely grazed or the pasture is mowed frequently, the sugar content will be elevated.
Your horses are likely prone to Equine Metabolic Syndrome/Insulin Resistance and their diet, body condition score and access to pasture need to be closely regulated. There are no pasture plants that have a low enough sugar content to allow free choice grazing.