I racked an Altbier to secondary on December 5 and have been lagering it at 45 degrees since then. Do I need to pitch some dry yeast when I bottle it? Its a 5 gallon batch, and I'm only going to bottle a 12 pack and keg the rest, so if I have to use dry yeast when I bottle, how much would I use? I used Wyeast 1007 German Ale Yeast when I brewed the batch.