I am making an Irish Stout from a True Brew Kit and transferred the beer to
a carboy 8 days ago for secondary fermentation. After some initial activity
in the carboy, the fermentation slowed down and the yeast pretty much
settled out. However today I have noticed significant activity in the
fermenter. There are a lot of bubbles on the surface of the beer and there
is bubbling in the airlock. Is this bad? Is it a sign of contamination? I
had plans to bottle this weekend.