First time chick person here! My first bag of chick feed was medicated Organic Manna Pro Starter Crumbles. Just bought a bag of Purina Starter/Grower from a feed store that's closer, just opened Purina bag to mix with the Manna Pro to switch, and the Purina has a yeasty (beer-like) smell. It's not overpowering, but the Manna Pro crumbles don't smell like that! Date on bag is April 8. Normal or not? Thanks!