when your beef beefs

I got my first Peapod delivery this morning. Its awesome and cheaper than going to Shaws....I was going to make a beef stew with some beef I had in the freezer (since December). Thawed it this week. Opened it up and I'm pretty sure it let out a big fart cuz it didn't smell right. Apparently this is not a good thing. It might be time to cut back on the meat.