I’ve been baking sourdough for months and months now, using my starter (Penny Jo) made from Penny’s recipe. Anyhow it is recommended to use an active bubbly starter. A few days ago I fed Penny Jo and she foamed up a little, but by the time I was ready to mix my dough she had settled down and nearly no bubbles. I thought maybe I’d have a flat loaf but you know that loaf had the most open texture and at least as much oven rise as any loaf I’ve baked so far. I was really happy with the results but surprised.