I have just made a lager recipe (5 gallon, og 1058) and I pitched 2 packs of wyeast 2278 into it last Monday (7 days ago) at 12 degrees C. I see no active fermentation yet and the gravity has not budged. I smacked the packs and they started to swell, the yeast was manufactured on 15 June so is not too old. Any idea why I am not getting action? I raised my temp to 15c yesterday to try to induce some action with a slightly warmer temp but still nothing. Any ideas, or shall I just be patient and wait for the critters to multiply enough to get critical mass? I didn't make a starter and my og is high so perhaps I should have.