Day three of rehydrating a sourdough starter. So far, so good, I think. I've never really done this before, but it's still bubbling, so I'm assuming that means that the flour and water feed I gave it is being consumed still. And it is slowly starting to get a bit of a vinegar smell. I guess that was supposed to happen on day two, but it's moving a little bit slower. And everything that I've read says that it can take up to a week for it to be ready to bake with.