I just switched my kitten to grain-free dry food and chose Whole Earth Farms because the ingredients looked really healthy, it's very affordable and it got great reviews, however...I can't find an expiration date or best by date anywhere on the bag! That's a little bit unsettling because I'd like to be assured the food isn't going stale. Can anyone else who uses this brand help me out? Maybe I missed it somewhere but I looked everywhere on the bag.