Funny, Mine are doing the same. We are grazing off property and bringing everyone home every night for safety. We learn a bit of the flow from the sheep as they learn a new pasture. They eat heavy in the early morning and then move to the shade. In the afternoon I see them run out graze 5-10 minutes and run back to the shade. Watching this we changed future pens to utilize the shade as our cooking cutter size wasn't going to work for shade.