I smacked a pack of Wyeast 2000 (Budvar Lager) today at about 1:00 PM. It's now 9:00 PM and it has not swelled at all. Looked at the date and it says 15 June 2010. Is the yeast too old? I haven't pitched yet thinking I'd wait to see if it was viable. Should I take it back to LHBS tomorrow to see if I can switch it out? Also, I made a 3L starter wort with Light DME and it is very dark. What's the deal with that? I plan to decant & just pitch the yeast anyway, but it is much darker than my previous starters, and it's the same DME. Any ideas? Thanks!