I brewed a Smooth Stout Monday, using Windsor Yeast. I hydrated it according to instructions. Tuesday morning I checked it before going to work and there was activation in the carboy, no bubbles in my blow off tube setup. When I go home about 10 hours later, there no activity and no krausen at all. I did brew a Deception Cream Stout and there was a short sign of activation too, I used a yeast starter in the DCS. Is this normal with stouts? It's only been 4 days in the primary.