[elipsis]

I've got a doppelbock in the primary right now and plan to lager for three or four weeks. When bottling should I add some fresh yeast or will there be enough left in the beer to metabolize the priming sugar?

[majorvices]

First off, I would lager a doppelbock for at least 8 weeks. And it is a good idea to add a little yeast back. A half packet of US-05 per 5 gallons will work fine. The yeast is neutral enough and the amount of fermentation so small that there will be no ale yeast flavors imparted to the beer.