I brew for my brother and he picked up the ingredients for his latest brew. However, he froze the hops and yeast instead of just the hops. Oops. The yeast was in his freezer from Thursday until today. Is that yeast dead? I've read conflicting stuff online about frozen yeast viability. Anybody here have success pitching yeast that had been previously frozen that long? I thawed it out at room temp and now smacked the pack. My theory is if I don't see anything inflate by this time tomorrow, it's best to pick up a new pack of Wyeast, but if it looks nice and puffed up, I'm going to pitch it. Underpitching some on wheat beers I kind of like doing - think you get better flavors that way.