Mine do their "wind sprints" in the evening when I get home from work, although last night they did it again when I came in from an evening with friends around 10:00 p.m. Mornings are for making as much noise as possible so mom will get up and feed them. This morning it was Mitzi knocking stuff off the nightstand and then Mishi walking on my face It was 6:00 a.m.! I wanted to sleep in! Kids!