So I have two batches of brew in secondary fermentation, a rye ipa and a reg ipa. My rye ipa has no activity at all since moving it into the new carboy, there are a few bubbles on top but that is all, no airlock bubbles...nothing. My reg ipa has a nice small head to it and the airlock is still showing activity, should I be concerned with the state of the rye ipa? Instructions say to let it secondary for 4 weeks, is this necessary with so little activity?