I think you are underestimating how quickly chickens' health can decline. A healthy looking chicken can go from normal to dead in 24 hours. You already know the feed has caused serious problems for one of your birds. Your first priority should be rectifying that asap. Not later when you get the chance.It hasn’t been two weeks. We found the mold this week and immediately stopped. My healthy chicken isn’t going to die or get sick from eating the old food for a couple of days until I go to Tractor Supply again.