It's interesting to think that grass is a living organism, sensitive to the weather, and with its own daily cycle of changes. Conditions like those we have now, with low temperatures at night, and warmer, sunny days, are ideal for grass to produce lots of NSCs - non-structural carbohydrates - including fructan. These are the culprit in grass laminitis, which is a risk for any horse, but especially those that are insulin-resistant. The NSC levels are highest in the afternoon, and especially high on those sunny days after cold nights.
We're very careful to introduce grazing slowly every year, but even brief grazing in conditions like this can be dangerous, so back in dry lot we go. It looks like our first grazing day will now be Sunday, and we'll probably reduce the time from the 2 1/2 hours we had reached. It'll take longer now to get out to the pastures full-day, but that's OK. For more information on these topics, visit safergrass.org.